/*  Prototype JavaScript framework, version 1.6.0.3
 *  (c) 2005-2009 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.6.0.3',

  Browser: {
    IE:     !!(window.attachEvent &&
      navigator.userAgent.indexOf('Opera') === -1),
    Opera:  navigator.userAgent.indexOf('Opera') > -1,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 &&
      navigator.userAgent.indexOf('KHTML') === -1,
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
  },

  BrowserFeatures: {
    XPath: !!document.evaluate,
    SelectorsAPI: !!document.querySelector,
    ElementExtensions: (function() {
      if (window.HTMLElement && window.HTMLElement.prototype)
        return true;
      if (window.Element && window.Element.prototype)
        return true;
    })(),
    SpecificElementExtensions: (function() {
      if (typeof window.HTMLDivElement !== 'undefined')
        return true;

      var div = document.createElement('div');
      if (div['__proto__'] && div['__proto__'] !==
       document.createElement('form')['__proto__']) {
        return true;
      }

      return false;
    })()
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },
  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;


var Abstract = { };


var Try = {
  these: function() {
    var returnValue;

    for (var i = 0, length = arguments.length; i < length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) { }
    }

    return returnValue;
  }
};

/* Based on Alex Arnell's inheritance implementation. */

var Class = (function() {
  function create() {
    var parent = null, properties = $A(arguments);
    if (Object.isFunction(properties[0]))
      parent = properties.shift();

    function klass() {
      this.initialize.apply(this, arguments);
    }

    Object.extend(klass, Class.Methods);
    klass.superclass = parent;
    klass.subclasses = [];

    if (parent) {
      var subclass = function() {};
      subclass.prototype = parent.prototype;
      klass.prototype = new subclass;
      parent.subclasses.push(klass);
    }

    for (var i = 0; i < properties.length; i++)
      klass.addMethods(properties[i]);

    if (!klass.prototype.initialize)
      klass.prototype.initialize = Prototype.emptyFunction;

    klass.prototype.constructor = klass;
    return klass;
  }

  function addMethods(source) {
    var ancestor   = this.superclass && this.superclass.prototype;
    var properties = Object.keys(source);

    if (!Object.keys({ toString: true }).length)
      properties.push("toString", "valueOf");

    for (var i = 0, length = properties.length; i < length; i++) {
      var property = properties[i], value = source[property];
      if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
        var method = value;
        value = (function(m) {
          return function() { return ancestor[m].apply(this, arguments); };
        })(property).wrap(method);

        value.valueOf = method.valueOf.bind(method);
        value.toString = method.toString.bind(method);
      }
      this.prototype[property] = value;
    }

    return this;
  }

  return {
    create: create,
    Methods: {
      addMethods: addMethods
    }
  };
})();
(function() {

  function getClass(object) {
    return Object.prototype.toString.call(object)
     .match(/^\[object\s(.*)\]$/)[1];
  }

  function extend(destination, source) {
    for (var property in source)
      destination[property] = source[property];
    return destination;
  }

  function inspect(object) {
    try {
      if (isUndefined(object)) return 'undefined';
      if (object === null) return 'null';
      return object.inspect ? object.inspect() : String(object);
    } catch (e) {
      if (e instanceof RangeError) return '...';
      throw e;
    }
  }

  function toJSON(object) {
    var type = typeof object;
    switch (type) {
      case 'undefined':
      case 'function':
      case 'unknown': return;
      case 'boolean': return object.toString();
    }

    if (object === null) return 'null';
    if (object.toJSON) return object.toJSON();
    if (isElement(object)) return;

    var results = [];
    for (var property in object) {
      var value = toJSON(object[property]);
      if (!isUndefined(value))
        results.push(property.toJSON() + ': ' + value);
    }

    return '{' + results.join(', ') + '}';
  }

  function toQueryString(object) {
    return $H(object).toQueryString();
  }

  function toHTML(object) {
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
  }

  function keys(object) {
    var results = [];
    for (var property in object)
      results.push(property);
    return results;
  }

  function values(object) {
    var results = [];
    for (var property in object)
      results.push(object[property]);
    return results;
  }

  function clone(object) {
    return extend({ }, object);
  }

  function isElement(object) {
    return !!(object && object.nodeType == 1);
  }

  function isArray(object) {
    return getClass(object) === "Array";
  }


  function isHash(object) {
    return object instanceof Hash;
  }

  function isFunction(object) {
    return typeof object === "function";
  }

  function isString(object) {
    return getClass(object) === "String";
  }

  function isNumber(object) {
    return getClass(object) === "Number";
  }

  function isUndefined(object) {
    return typeof object === "undefined";
  }

  extend(Object, {
    extend:        extend,
    inspect:       inspect,
    toJSON:        toJSON,
    toQueryString: toQueryString,
    toHTML:        toHTML,
    keys:          keys,
    values:        values,
    clone:         clone,
    isElement:     isElement,
    isArray:       isArray,
    isHash:        isHash,
    isFunction:    isFunction,
    isString:      isString,
    isNumber:      isNumber,
    isUndefined:   isUndefined
  });
})();
Object.extend(Function.prototype, (function() {
  var slice = Array.prototype.slice;

  function update(array, args) {
    var arrayLength = array.length, length = args.length;
    while (length--) array[arrayLength + length] = args[length];
    return array;
  }

  function merge(array, args) {
    array = slice.call(array, 0);
    return update(array, args);
  }

  function argumentNames() {
    var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]
      .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
      .replace(/\s+/g, '').split(',');
    return names.length == 1 && !names[0] ? [] : names;
  }

  function bind(context) {
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
    var __method = this, args = slice.call(arguments, 1);
    return function() {
      var a = merge(args, arguments);
      return __method.apply(context, a);
    }
  }

  function bindAsEventListener(context) {
    var __method = this, args = slice.call(arguments, 1);
    return function(event) {
      var a = update([event || window.event], args);
      return __method.apply(context, a);
    }
  }

  function curry() {
    if (!arguments.length) return this;
    var __method = this, args = slice.call(arguments, 0);
    return function() {
      var a = merge(args, arguments);
      return __method.apply(this, a);
    }
  }

  function delay(timeout) {
    var __method = this, args = slice.call(arguments, 1);
    timeout = timeout * 1000
    return window.setTimeout(function() {
      return __method.apply(__method, args);
    }, timeout);
  }

  function defer() {
    var args = update([0.01], arguments);
    return this.delay.apply(this, args);
  }

  function wrap(wrapper) {
    var __method = this;
    return function() {
      var a = update([__method.bind(this)], arguments);
      return wrapper.apply(this, a);
    }
  }

  function methodize() {
    if (this._methodized) return this._methodized;
    var __method = this;
    return this._methodized = function() {
      var a = update([this], arguments);
      return __method.apply(null, a);
    };
  }

  return {
    argumentNames:       argumentNames,
    bind:                bind,
    bindAsEventListener: bindAsEventListener,
    curry:               curry,
    delay:               delay,
    defer:               defer,
    wrap:                wrap,
    methodize:           methodize
  }
})());


Date.prototype.toJSON = function() {
  return '"' + this.getUTCFullYear() + '-' +
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
    this.getUTCDate().toPaddedString(2) + 'T' +
    this.getUTCHours().toPaddedString(2) + ':' +
    this.getUTCMinutes().toPaddedString(2) + ':' +
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
};


RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};
var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;

    this.registerCallback();
  },

  registerCallback: function() {
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
    this.callback(this);
  },

  stop: function() {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = null;
  },

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.execute();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
});
Object.extend(String, {
  interpret: function(value) {
    return value == null ? '' : String(value);
  },
  specialChar: {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '\\': '\\\\'
  }
});

Object.extend(String.prototype, (function() {

  function prepareReplacement(replacement) {
    if (Object.isFunction(replacement)) return replacement;
    var template = new Template(replacement);
    return function(match) { return template.evaluate(match) };
  }

  function gsub(pattern, replacement) {
    var result = '', source = this, match;
    replacement = prepareReplacement(replacement);

    if (!(pattern.length || pattern.source)) {
      replacement = replacement('');
      return replacement + source.split('').join(replacement) + replacement;
    }

    while (source.length > 0) {
      if (match = source.match(pattern)) {
        result += source.slice(0, match.index);
        result += String.interpret(replacement(match));
        source  = source.slice(match.index + match[0].length);
      } else {
        result += source, source = '';
      }
    }
    return result;
  }

  function sub(pattern, replacement, count) {
    replacement = prepareReplacement(replacement);
    count = Object.isUndefined(count) ? 1 : count;

    return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
    });
  }

  function scan(pattern, iterator) {
    this.gsub(pattern, iterator);
    return String(this);
  }

  function truncate(length, truncation) {
    length = length || 30;
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
    return this.length > length ?
      this.slice(0, length - truncation.length) + truncation : String(this);
  }

  function strip() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
  }

  function stripTags() {
    return this.replace(/<\/?[^>]+>/gi, '');
  }

  function stripScripts() {
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  }

  function extractScripts() {
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
    return (this.match(matchAll) || []).map(function(scriptTag) {
      return (scriptTag.match(matchOne) || ['', ''])[1];
    });
  }

  function evalScripts() {
    return this.extractScripts().map(function(script) { return eval(script) });
  }

  function escapeHTML() {
    escapeHTML.text.data = this;
    return escapeHTML.div.innerHTML;
  }

  function unescapeHTML() {
    var div = new Element('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
  }

  function toQueryParams(separator) {
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
    if (!match) return { };

    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
      if ((pair = pair.split('='))[0]) {
        var key = decodeURIComponent(pair.shift());
        var value = pair.length > 1 ? pair.join('=') : pair[0];
        if (value != undefined) value = decodeURIComponent(value);

        if (key in hash) {
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
          hash[key].push(value);
        }
        else hash[key] = value;
      }
      return hash;
    });
  }

  function toArray() {
    return this.split('');
  }

  function succ() {
    return this.slice(0, this.length - 1) +
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  }

  function times(count) {
    return count < 1 ? '' : new Array(count + 1).join(this);
  }

  function camelize() {
    var parts = this.split('-'), len = parts.length;
    if (len == 1) return parts[0];

    var camelized = this.charAt(0) == '-'
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
      : parts[0];

    for (var i = 1; i < len; i++)
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

    return camelized;
  }

  function capitalize() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  }

  function underscore() {
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
  }

  function dasherize() {
    return this.gsub(/_/,'-');
  }

  function inspect(useDoubleQuotes) {
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
      var character = String.specialChar[match[0]];
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
    });
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  }

  function toJSON() {
    return this.inspect(true);
  }

  function unfilterJSON(filter) {
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
  }

  function isJSON() {
    var str = this;
    if (str.blank()) return false;
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  }

  function evalJSON(sanitize) {
    var json = this.unfilterJSON();
    try {
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
    } catch (e) { }
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  }

  function include(pattern) {
    return this.indexOf(pattern) > -1;
  }

  function startsWith(pattern) {
    return this.indexOf(pattern) === 0;
  }

  function endsWith(pattern) {
    var d = this.length - pattern.length;
    return d >= 0 && this.lastIndexOf(pattern) === d;
  }

  function empty() {
    return this == '';
  }

  function blank() {
    return /^\s*$/.test(this);
  }

  function interpolate(object, pattern) {
    return new Template(this, pattern).evaluate(object);
  }

  return {
    gsub:           gsub,
    sub:            sub,
    scan:           scan,
    truncate:       truncate,
    strip:          strip,
    stripTags:      stripTags,
    stripScripts:   stripScripts,
    extractScripts: extractScripts,
    evalScripts:    evalScripts,
    escapeHTML:     escapeHTML,
    unescapeHTML:   unescapeHTML,
    toQueryParams:  toQueryParams,
    parseQuery:     toQueryParams,
    toArray:        toArray,
    succ:           succ,
    times:          times,
    camelize:       camelize,
    capitalize:     capitalize,
    underscore:     underscore,
    dasherize:      dasherize,
    inspect:        inspect,
    toJSON:         toJSON,
    unfilterJSON:   unfilterJSON,
    isJSON:         isJSON,
    evalJSON:       evalJSON,
    include:        include,
    startsWith:     startsWith,
    endsWith:       endsWith,
    empty:          empty,
    blank:          blank,
    interpolate:    interpolate
  };
})());

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
  escapeHTML: function() {
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  },
  unescapeHTML: function() {
    return this.stripTags().replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
  }
});

Object.extend(String.prototype.escapeHTML, {
  div:  document.createElement('div'),
  text: document.createTextNode('')
});

String.prototype.escapeHTML.div.appendChild(String.prototype.escapeHTML.text);

var Template = Class.create({
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    if (Object.isFunction(object.toTemplateReplacements))
      object = object.toTemplateReplacements();

    return this.template.gsub(this.pattern, function(match) {
      if (object == null) return '';

      var before = match[1] || '';
      if (before == '\\') return match[2];

      var ctx = object, expr = match[3];
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
      match = pattern.exec(expr);
      if (match == null) return before;

      while (match != null) {
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
        ctx = ctx[comp];
        if (null == ctx || '' == match[3]) break;
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
        match = pattern.exec(expr);
      }

      return before + String.interpret(ctx);
    });
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = (function() {
  function each(iterator, context) {
    var index = 0;
    try {
      this._each(function(value) {
        iterator.call(context, value, index++);
      });
    } catch (e) {
      if (e != $break) throw e;
    }
    return this;
  }

  function eachSlice(number, iterator, context) {
    var index = -number, slices = [], array = this.toArray();
    if (number < 1) return array;
    while ((index += number) < array.length)
      slices.push(array.slice(index, index+number));
    return slices.collect(iterator, context);
  }

  function all(iterator, context) {
    iterator = iterator || Prototype.K;
    var result = true;
    this.each(function(value, index) {
      result = result && !!iterator.call(context, value, index);
      if (!result) throw $break;
    });
    return result;
  }

  function any(iterator, context) {
    iterator = iterator || Prototype.K;
    var result = false;
    this.each(function(value, index) {
      if (result = !!iterator.call(context, value, index))
        throw $break;
    });
    return result;
  }

  function collect(iterator, context) {
    iterator = iterator || Prototype.K;
    var results = [];
    this.each(function(value, index) {
      results.push(iterator.call(context, value, index));
    });
    return results;
  }

  function detect(iterator, context) {
    var result;
    this.each(function(value, index) {
      if (iterator.call(context, value, index)) {
        result = value;
        throw $break;
      }
    });
    return result;
  }

  function findAll(iterator, context) {
    var results = [];
    this.each(function(value, index) {
      if (iterator.call(context, value, index))
        results.push(value);
    });
    return results;
  }

  function grep(filter, iterator, context) {
    iterator = iterator || Prototype.K;
    var results = [];

    if (Object.isString(filter))
      filter = new RegExp(RegExp.escape(filter));

    this.each(function(value, index) {
      if (filter.match(value))
        results.push(iterator.call(context, value, index));
    });
    return results;
  }

  function include(object) {
    if (Object.isFunction(this.indexOf))
      if (this.indexOf(object) != -1) return true;

    var found = false;
    this.each(function(value) {
      if (value == object) {
        found = true;
        throw $break;
      }
    });
    return found;
  }

  function inGroupsOf(number, fillWith) {
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
    return this.eachSlice(number, function(slice) {
      while(slice.length < number) slice.push(fillWith);
      return slice;
    });
  }

  function inject(memo, iterator, context) {
    this.each(function(value, index) {
      memo = iterator.call(context, memo, value, index);
    });
    return memo;
  }

  function invoke(method) {
    var args = $A(arguments).slice(1);
    return this.map(function(value) {
      return value[method].apply(value, args);
    });
  }

  function max(iterator, context) {
    iterator = iterator || Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator.call(context, value, index);
      if (result == null || value >= result)
        result = value;
    });
    return result;
  }

  function min(iterator, context) {
    iterator = iterator || Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator.call(context, value, index);
      if (result == null || value < result)
        result = value;
    });
    return result;
  }

  function partition(iterator, context) {
    iterator = iterator || Prototype.K;
    var trues = [], falses = [];
    this.each(function(value, index) {
      (iterator.call(context, value, index) ?
        trues : falses).push(value);
    });
    return [trues, falses];
  }

  function pluck(property) {
    var results = [];
    this.each(function(value) {
      results.push(value[property]);
    });
    return results;
  }

  function reject(iterator, context) {
    var results = [];
    this.each(function(value, index) {
      if (!iterator.call(context, value, index))
        results.push(value);
    });
    return results;
  }

  function sortBy(iterator, context) {
    return this.map(function(value, index) {
      return {
        value: value,
        criteria: iterator.call(context, value, index)
      };
    }).sort(function(left, right) {
      var a = left.criteria, b = right.criteria;
      return a < b ? -1 : a > b ? 1 : 0;
    }).pluck('value');
  }

  function toArray() {
    return this.map();
  }

  function zip() {
    var iterator = Prototype.K, args = $A(arguments);
    if (Object.isFunction(args.last()))
      iterator = args.pop();

    var collections = [this].concat(args).map($A);
    return this.map(function(value, index) {
      return iterator(collections.pluck(index));
    });
  }

  function size() {
    return this.toArray().length;
  }

  function inspect() {
    return '#<Enumerable:' + this.toArray().inspect() + '>';
  }

  return {
    each:       each,
    eachSlice:  eachSlice,
    all:        all,
    every:      all,
    any:        any,
    some:       any,
    collect:    collect,
    map:        collect,
    detect:     detect,
    findAll:    findAll,
    select:     findAll,
    filter:     findAll,
    grep:       grep,
    include:    include,
    member:     include,
    inGroupsOf: inGroupsOf,
    inject:     inject,
    invoke:     invoke,
    max:        max,
    min:        min,
    partition:  partition,
    pluck:      pluck,
    reject:     reject,
    sortBy:     sortBy,
    toArray:    toArray,
    entries:    toArray,
    zip:        zip,
    size:       size,
    inspect:    inspect,
    find:       detect
  };
})();
function $A(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) return iterable.toArray();
  var length = iterable.length || 0, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}

if (Prototype.Browser.WebKit) {
  $A = function(iterable) {
    if (!iterable) return [];
    if (!(typeof iterable === 'function' && typeof iterable.length ===
        'number' && typeof iterable.item === 'function') && iterable.toArray)
      return iterable.toArray();
    var length = iterable.length || 0, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
  };
}

function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

Array.from = $A;

(function() {
  var arrayProto = Array.prototype,
      slice = arrayProto.slice,
      _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available

  function each(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  }
  if (!_each) _each = each;

  function clear() {
    this.length = 0;
    return this;
  }

  function first() {
    return this[0];
  }

  function last() {
    return this[this.length - 1];
  }

  function compact() {
    return this.select(function(value) {
      return value != null;
    });
  }

  function flatten() {
    return this.inject([], function(array, value) {
      if (Object.isArray(value))
        return array.concat(value.flatten());
      array.push(value);
      return array;
    });
  }

  function without() {
    var values = slice.call(arguments, 0);
    return this.select(function(value) {
      return !values.include(value);
    });
  }

  function reverse(inline) {
    return (inline !== false ? this : this.toArray())._reverse();
  }

  function reduce() {
    return this.length > 1 ? this : this[0];
  }

  function uniq(sorted) {
    return this.inject([], function(array, value, index) {
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
        array.push(value);
      return array;
    });
  }

  function intersect(array) {
    return this.uniq().findAll(function(item) {
      return array.detect(function(value) { return item === value });
    });
  }

  function clone() {
    return slice.call(this, 0);
  }

  function size() {
    return this.length;
  }

  function inspect() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  }

  function toJSON() {
    var results = [];
    this.each(function(object) {
      var value = Object.toJSON(object);
      if (!Object.isUndefined(value)) results.push(value);
    });
    return '[' + results.join(', ') + ']';
  }

  function indexOf(item, i) {
    i || (i = 0);
    var length = this.length;
    if (i < 0) i = length + i;
    for (; i < length; i++)
      if (this[i] === item) return i;
    return -1;
  }

  function lastIndexOf(item, i) {
    i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
    var n = this.slice(0, i).reverse().indexOf(item);
    return (n < 0) ? n : i - n - 1;
  }

  function concat() {
    var array = slice.call(this, 0), item;
    for (var i = 0, length = arguments.length; i < length; i++) {
      item = arguments[i];
      if (Object.isArray(item) && !('callee' in item)) {
        for (var j = 0, arrayLength = item.length; j < arrayLength; j++)
          array.push(item[j]);
      } else {
        array.push(item);
      }
    }
    return array;
  }

  Object.extend(arrayProto, Enumerable);

  if (!arrayProto._reverse)
    arrayProto._reverse = arrayProto.reverse;

  Object.extend(arrayProto, {
    _each:     _each,
    clear:     clear,
    first:     first,
    last:      last,
    compact:   compact,
    flatten:   flatten,
    without:   without,
    reverse:   reverse,
    reduce:    reduce,
    uniq:      uniq,
    intersect: intersect,
    clone:     clone,
    toArray:   clone,
    size:      size,
    inspect:   inspect,
    toJSON:    toJSON
  });

  var CONCAT_ARGUMENTS_BUGGY = (function() {
    return [].concat(arguments)[0][0] !== 1;
  })(1,2)

  if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;

  if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;
  if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;
})();
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {
  function initialize(object) {
    this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
  }

  function _each(iterator) {
    for (var key in this._object) {
      var value = this._object[key], pair = [key, value];
      pair.key = key;
      pair.value = value;
      iterator(pair);
    }
  }

  function set(key, value) {
    return this._object[key] = value;
  }

  function get(key) {
    if (this._object[key] !== Object.prototype[key])
      return this._object[key];
  }

  function unset(key) {
    var value = this._object[key];
    delete this._object[key];
    return value;
  }

  function toObject() {
    return Object.clone(this._object);
  }

  function keys() {
    return this.pluck('key');
  }

  function values() {
    return this.pluck('value');
  }

  function index(value) {
    var match = this.detect(function(pair) {
      return pair.value === value;
    });
    return match && match.key;
  }

  function merge(object) {
    return this.clone().update(object);
  }

  function update(object) {
    return new Hash(object).inject(this, function(result, pair) {
      result.set(pair.key, pair.value);
      return result;
    });
  }

  function toQueryPair(key, value) {
    if (Object.isUndefined(value)) return key;
    return key + '=' + encodeURIComponent(String.interpret(value));
  }

  function toQueryString() {
    return this.inject([], function(results, pair) {
      var key = encodeURIComponent(pair.key), values = pair.value;

      if (values && typeof values == 'object') {
        if (Object.isArray(values))
          return results.concat(values.map(toQueryPair.curry(key)));
      } else results.push(toQueryPair(key, values));
      return results;
    }).join('&');
  }

  function inspect() {
    return '#<Hash:{' + this.map(function(pair) {
      return pair.map(Object.inspect).join(': ');
    }).join(', ') + '}>';
  }

  function toJSON() {
    return Object.toJSON(this.toObject());
  }

  function clone() {
    return new Hash(this);
  }

  return {
    initialize:             initialize,
    _each:                  _each,
    set:                    set,
    get:                    get,
    unset:                  unset,
    toObject:               toObject,
    toTemplateReplacements: toObject,
    keys:                   keys,
    values:                 values,
    index:                  index,
    merge:                  merge,
    update:                 update,
    toQueryString:          toQueryString,
    inspect:                inspect,
    toJSON:                 toJSON,
    clone:                  clone
  };
})());

Hash.from = $H;
Object.extend(Number.prototype, (function() {
  function toColorPart() {
    return this.toPaddedString(2, 16);
  }

  function succ() {
    return this + 1;
  }

  function times(iterator, context) {
    $R(0, this, true).each(iterator, context);
    return this;
  }

  function toPaddedString(length, radix) {
    var string = this.toString(radix || 10);
    return '0'.times(length - string.length) + string;
  }

  function toJSON() {
    return isFinite(this) ? this.toString() : 'null';
  }

  function abs() {
    return Math.abs(this);
  }

  function round() {
    return Math.round(this);
  }

  function ceil() {
    return Math.ceil(this);
  }

  function floor() {
    return Math.floor(this);
  }

  return {
    toColorPart:    toColorPart,
    succ:           succ,
    times:          times,
    toPaddedString: toPaddedString,
    toJSON:         toJSON,
    abs:            abs,
    round:          round,
    ceil:           ceil,
    floor:          floor
  };
})());

function $R(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
}

var ObjectRange = Class.create(Enumerable, (function() {
  function initialize(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  }

  function _each(iterator) {
    var value = this.start;
    while (this.include(value)) {
      iterator(value);
      value = value.succ();
    }
  }

  function include(value) {
    if (value < this.start)
      return false;
    if (this.exclusive)
      return value < this.end;
    return value <= this.end;
  }

  return {
    initialize: initialize,
    _each:      _each,
    include:    include
  };
})());

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};
Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});
Ajax.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();

    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
    else if (Object.isHash(this.options.parameters))
      this.options.parameters = this.options.parameters.toObject();
  }
});
Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = Ajax.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new Ajax.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      Ajax.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && this.isSameOrigin() && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  isSameOrigin: function() {
    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
      protocol: location.protocol,
      domain: document.domain,
      port: location.port ? ':' + location.port : ''
    }));
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name) || null;
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
Ajax.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')) ||
        this.responseText.blank())
          return null;
    try {
      return this.responseText.evalJSON(options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});
Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = Object.clone(options);
    var onComplete = options.onComplete;
    options.onComplete = (function(response, json) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, json);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }
  }
});
Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
function $(element) {
  if (arguments.length > 1) {
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
      elements.push($(arguments[i]));
    return elements;
  }
  if (Object.isString(element))
    element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
    var results = [];
    var query = document.evaluate(expression, $(parentElement) || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    for (var i = 0, length = query.snapshotLength; i < length; i++)
      results.push(Element.extend(query.snapshotItem(i)));
    return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  Object.extend(Node, {
    ELEMENT_NODE: 1,
    ATTRIBUTE_NODE: 2,
    TEXT_NODE: 3,
    CDATA_SECTION_NODE: 4,
    ENTITY_REFERENCE_NODE: 5,
    ENTITY_NODE: 6,
    PROCESSING_INSTRUCTION_NODE: 7,
    COMMENT_NODE: 8,
    DOCUMENT_NODE: 9,
    DOCUMENT_TYPE_NODE: 10,
    DOCUMENT_FRAGMENT_NODE: 11,
    NOTATION_NODE: 12
  });
}

(function(global) {
  var element = global.Element;
  global.Element = function(tagName, attributes) {
    attributes = attributes || { };
    tagName = tagName.toLowerCase();
    var cache = Element.cache;
    if (Prototype.Browser.IE && attributes.name) {
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
      delete attributes.name;
      return Element.writeAttribute(document.createElement(tagName), attributes);
    }
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
  };
  Object.extend(global.Element, element || { });
  if (element) global.Element.prototype = element.prototype;
})(this);

Element.cache = { };
Element.idCounter = 1;

Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },

  toggle: function(element) {
    element = $(element);
    Element[Element.visible(element) ? 'hide' : 'show'](element);
    return element;
  },

  hide: function(element) {
    element = $(element);
    element.style.display = 'none';
    return element;
  },

  show: function(element) {
    element = $(element);
    element.style.display = '';
    return element;
  },

  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
    return element;
  },

  update: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);
    content = Object.toHTML(content);
    element.innerHTML = content.stripScripts();
    content.evalScripts.bind(content).defer();
    return element;
  },

  replace: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    else if (!Object.isElement(content)) {
      content = Object.toHTML(content);
      var range = element.ownerDocument.createRange();
      range.selectNode(element);
      content.evalScripts.bind(content).defer();
      content = range.createContextualFragment(content.stripScripts());
    }
    element.parentNode.replaceChild(content, element);
    return element;
  },

  insert: function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = {bottom:insertions};

    var content, insert, tagName, childNodes;

    for (var position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      insert = Element._insertionTranslations[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        insert(element, content);
        continue;
      }

      content = Object.toHTML(content);

      tagName = ((position == 'before' || position == 'after')
        ? element.parentNode : element).tagName.toUpperCase();

      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

      if (position == 'top' || position == 'after') childNodes.reverse();
      childNodes.each(insert.curry(element));

      content.evalScripts.bind(content).defer();
    }

    return element;
  },

  wrap: function(element, wrapper, attributes) {
    element = $(element);
    if (Object.isElement(wrapper))
      $(wrapper).writeAttribute(attributes || { });
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
    else wrapper = new Element('div', wrapper);
    if (element.parentNode)
      element.parentNode.replaceChild(wrapper, element);
    wrapper.appendChild(element);
    return wrapper;
  },

  inspect: function(element) {
    element = $(element);
    var result = '<' + element.tagName.toLowerCase();
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
      var property = pair.first(), attribute = pair.last();
      var value = (element[property] || '').toString();
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
    });
    return result + '>';
  },

  recursivelyCollect: function(element, property) {
    element = $(element);
    var elements = [];
    while (element = element[property])
      if (element.nodeType == 1)
        elements.push(Element.extend(element));
    return elements;
  },

  ancestors: function(element) {
    return $(element).recursivelyCollect('parentNode');
  },

  descendants: function(element) {
    return $(element).select("*");
  },

  firstDescendant: function(element) {
    element = $(element).firstChild;
    while (element && element.nodeType != 1) element = element.nextSibling;
    return $(element);
  },

  immediateDescendants: function(element) {
    if (!(element = $(element).firstChild)) return [];
    while (element && element.nodeType != 1) element = element.nextSibling;
    if (element) return [element].concat($(element).nextSiblings());
    return [];
  },

  previousSiblings: function(element) {
    return $(element).recursivelyCollect('previousSibling');
  },

  nextSiblings: function(element) {
    return $(element).recursivelyCollect('nextSibling');
  },

  siblings: function(element) {
    element = $(element);
    return element.previousSiblings().reverse().concat(element.nextSiblings());
  },

  match: function(element, selector) {
    if (Object.isString(selector))
      selector = new Selector(selector);
    return selector.match($(element));
  },

  up: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(element.parentNode);
    var ancestors = element.ancestors();
    return Object.isNumber(expression) ? ancestors[expression] :
      Selector.findElement(ancestors, expression, index);
  },

  down: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return element.firstDescendant();
    return Object.isNumber(expression) ? element.descendants()[expression] :
      Element.select(element, expression)[index || 0];
  },

  previous: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
    var previousSiblings = element.previousSiblings();
    return Object.isNumber(expression) ? previousSiblings[expression] :
      Selector.findElement(previousSiblings, expression, index);
  },

  next: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
    var nextSiblings = element.nextSiblings();
    return Object.isNumber(expression) ? nextSiblings[expression] :
      Selector.findElement(nextSiblings, expression, index);
  },

  select: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element, args);
  },

  adjacent: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element.parentNode, args).without(element);
  },

  identify: function(element) {
    element = $(element);
    var id = element.readAttribute('id');
    if (id) return id;
    do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));
    element.writeAttribute('id', id);
    return id;
  },

  readAttribute: function(element, name) {
    element = $(element);
    if (Prototype.Browser.IE) {
      var t = Element._attributeTranslations.read;
      if (t.values[name]) return t.values[name](element, name);
      if (t.names[name]) name = t.names[name];
      if (name.include(':')) {
        return (!element.attributes || !element.attributes[name]) ? null :
         element.attributes[name].value;
      }
    }

    return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
    element = $(element);
    var attributes = { }, t = Element._attributeTranslations.write;

    if (typeof name == 'object') attributes = name;
    else attributes[name] = Object.isUndefined(value) ? true : value;

    for (var attr in attributes) {
      name = t.names[attr] || attr;
      value = attributes[attr];
      if (t.values[attr]) name = t.values[attr](element, value);
      if (value === false || value === null)
        element.removeAttribute(name);
      else if (value === true)
        element.setAttribute(name, name);
      else element.setAttribute(name, value);
    }
    return element;
  },

  getHeight: function(element) {
    return $(element).getDimensions().height;
  },

  getWidth: function(element) {
    return $(element).getDimensions().width;
  },

  classNames: function(element) {
    return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    var elementClassName = element.className;
    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    if (!element.hasClassName(className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    element.className = element.className.replace(
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
    return element;
  },

  toggleClassName: function(element, className) {
    if (!(element = $(element))) return;
    return element[element.hasClassName(className) ?
      'removeClassName' : 'addClassName'](className);
  },

  cleanWhitespace: function(element) {
    element = $(element);
    var node = element.firstChild;
    while (node) {
      var nextNode = node.nextSibling;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        element.removeChild(node);
      node = nextNode;
    }
    return element;
  },

  empty: function(element) {
    return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);

    if (element.compareDocumentPosition)
      return (element.compareDocumentPosition(ancestor) & 8) === 8;

    if (ancestor.contains)
      return ancestor.contains(element) && ancestor !== element;

    while (element = element.parentNode)
      if (element == ancestor) return true;

    return false;
  },

  scrollTo: function(element) {
    element = $(element);
    var pos = element.cumulativeOffset();
    window.scrollTo(pos[0], pos[1]);
    return element;
  },

  getStyle: function(element, style) {
    element = $(element);
    style = style == 'float' ? 'cssFloat' : style.camelize();
    var value = element.style[style];
    if (!value || value == 'auto') {
      var css = document.defaultView.getComputedStyle(element, null);
      value = css ? css[style] : null;
    }
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
    return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
    return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
    element = $(element);
    var elementStyle = element.style, match;
    if (Object.isString(styles)) {
      element.style.cssText += ';' + styles;
      return styles.include('opacity') ?
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
    }
    for (var property in styles)
      if (property == 'opacity') element.setOpacity(styles[property]);
      else
        elementStyle[(property == 'float' || property == 'cssFloat') ?
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
            property] = styles[property];

    return element;
  },

  setOpacity: function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;
    return element;
  },

  getDimensions: function(element) {
    element = $(element);
    var display = element.getStyle('display');
    if (display != 'none' && display != null) // Safari bug
      return {width: element.offsetWidth, height: element.offsetHeight};

    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    if (originalPosition != 'fixed') // Switching fixed to absolute causes issues in Safari
      els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
  },

  makePositioned: function(element) {
    element = $(element);
    var pos = Element.getStyle(element, 'position');
    if (pos == 'static' || !pos) {
      element._madePositioned = true;
      element.style.position = 'relative';
      if (Prototype.Browser.Opera) {
        element.style.top = 0;
        element.style.left = 0;
      }
    }
    return element;
  },

  undoPositioned: function(element) {
    element = $(element);
    if (element._madePositioned) {
      element._madePositioned = undefined;
      element.style.position =
        element.style.top =
        element.style.left =
        element.style.bottom =
        element.style.right = '';
    }
    return element;
  },

  makeClipping: function(element) {
    element = $(element);
    if (element._overflow) return element;
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
    if (element._overflow !== 'hidden')
      element.style.overflow = 'hidden';
    return element;
  },

  undoClipping: function(element) {
    element = $(element);
    if (!element._overflow) return element;
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
    element._overflow = null;
    return element;
  },

  cumulativeOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        if (element.tagName.toUpperCase() == 'BODY') break;
        var p = Element.getStyle(element, 'position');
        if (p !== 'static') break;
      }
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  absolutize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'absolute') return element;

    var offsets = element.positionedOffset();
    var top     = offsets[1];
    var left    = offsets[0];
    var width   = element.clientWidth;
    var height  = element.clientHeight;

    element._originalLeft   = left - parseFloat(element.style.left  || 0);
    element._originalTop    = top  - parseFloat(element.style.top || 0);
    element._originalWidth  = element.style.width;
    element._originalHeight = element.style.height;

    element.style.position = 'absolute';
    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.width  = width + 'px';
    element.style.height = height + 'px';
    return element;
  },

  relativize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'relative') return element;

    element.style.position = 'relative';
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.height = element._originalHeight;
    element.style.width  = element._originalWidth;
    return element;
  },

  cumulativeScrollOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  getOffsetParent: function(element) {
    if (element.offsetParent) return $(element.offsetParent);
    if (element == document.body) return $(element);

    while ((element = element.parentNode) && element != document.body)
      if (Element.getStyle(element, 'position') != 'static')
        return $(element);

    return $(document.body);
  },

  viewportOffset: function(forElement) {
    var valueT = 0, valueL = 0;

    var element = forElement;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;

      if (element.offsetParent == document.body &&
        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
        valueT -= element.scrollTop  || 0;
        valueL -= element.scrollLeft || 0;
      }
    } while (element = element.parentNode);

    return Element._returnOffset(valueL, valueT);
  },

  clonePosition: function(element, source) {
    var options = Object.extend({
      setLeft:    true,
      setTop:     true,
      setWidth:   true,
      setHeight:  true,
      offsetTop:  0,
      offsetLeft: 0
    }, arguments[2] || { });

    source = $(source);
    var p = source.viewportOffset();

    element = $(element);
    var delta = [0, 0];
    var parent = null;
    if (Element.getStyle(element, 'position') == 'absolute') {
      parent = element.getOffsetParent();
      delta = parent.viewportOffset();
    }

    if (parent == document.body) {
      delta[0] -= document.body.offsetLeft;
      delta[1] -= document.body.offsetTop;
    }

    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
    return element;
  }
};

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,
  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
    names: {
      className: 'class',
      htmlFor:   'for'
    },
    values: { }
  }
};

if (Prototype.Browser.Opera) {
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
    function(proceed, element, style) {
      switch (style) {
        case 'left': case 'top': case 'right': case 'bottom':
          if (proceed(element, 'position') === 'static') return null;
        case 'height': case 'width':
          if (!Element.visible(element)) return null;

          var dim = parseInt(proceed(element, style), 10);

          if (dim !== element['offset' + style.capitalize()])
            return dim + 'px';

          var properties;
          if (style === 'height') {
            properties = ['border-top-width', 'padding-top',
             'padding-bottom', 'border-bottom-width'];
          }
          else {
            properties = ['border-left-width', 'padding-left',
             'padding-right', 'border-right-width'];
          }
          return properties.inject(dim, function(memo, property) {
            var val = proceed(element, property);
            return val === null ? memo : memo - parseInt(val, 10);
          }) + 'px';
        default: return proceed(element, style);
      }
    }
  );

  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
    function(proceed, element, attribute) {
      if (attribute === 'title') return element.title;
      return proceed(element, attribute);
    }
  );
}

else if (Prototype.Browser.IE) {
  Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
    function(proceed, element) {
      element = $(element);
      try { element.offsetParent }
      catch(e) { return $(document.body) }
      var position = element.getStyle('position');
      if (position !== 'static') return proceed(element);
      element.setStyle({ position: 'relative' });
      var value = proceed(element);
      element.setStyle({ position: position });
      return value;
    }
  );

  $w('positionedOffset viewportOffset').each(function(method) {
    Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element) {
        element = $(element);
        try { element.offsetParent }
        catch(e) { return Element._returnOffset(0,0) }
        var position = element.getStyle('position');
        if (position !== 'static') return proceed(element);
        var offsetParent = element.getOffsetParent();
        if (offsetParent && offsetParent.getStyle('position') === 'fixed')
          offsetParent.setStyle({ zoom: 1 });
        element.setStyle({ position: 'relative' });
        var value = proceed(element);
        element.setStyle({ position: position });
        return value;
      }
    );
  });

  Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(
    function(proceed, element) {
      try { element.offsetParent }
      catch(e) { return Element._returnOffset(0,0) }
      return proceed(element);
    }
  );

  Element.Methods.getStyle = function(element, style) {
    element = $(element);
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
    var value = element.style[style];
    if (!value && element.currentStyle) value = element.currentStyle[style];

    if (style == 'opacity') {
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (value[1]) return parseFloat(value[1]) / 100;
      return 1.0;
    }

    if (value == 'auto') {
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
        return element['offset' + style.capitalize()] + 'px';
      return null;
    }
    return value;
  };

  Element.Methods.setOpacity = function(element, value) {
    function stripAlpha(filter){
      return filter.replace(/alpha\([^\)]*\)/gi,'');
    }
    element = $(element);
    var currentStyle = element.currentStyle;
    if ((currentStyle && !currentStyle.hasLayout) ||
      (!currentStyle && element.style.zoom == 'normal'))
        element.style.zoom = 1;

    var filter = element.getStyle('filter'), style = element.style;
    if (value == 1 || value === '') {
      (filter = stripAlpha(filter)) ?
        style.filter = filter : style.removeAttribute('filter');
      return element;
    } else if (value < 0.00001) value = 0;
    style.filter = stripAlpha(filter) +
      'alpha(opacity=' + (value * 100) + ')';
    return element;
  };

  Element._attributeTranslations = {
    read: {
      names: {
        'class': 'className',
        'for':   'htmlFor'
      },
      values: {
        _getAttr: function(element, attribute) {
          return element.getAttribute(attribute, 2);
        },
        _getAttrNode: function(element, attribute) {
          var node = element.getAttributeNode(attribute);
          return node ? node.value : "";
        },
        _getEv: function(element, attribute) {
          attribute = element.getAttribute(attribute);

          if (!attribute) return null;
          attribute = attribute.toString();
          attribute = attribute.split('{')[1];
          attribute = attribute.split('}')[0];
          return attribute.strip();
        },
        _flag: function(element, attribute) {
          return $(element).hasAttribute(attribute) ? attribute : null;
        },
        style: function(element) {
          return element.style.cssText.toLowerCase();
        },
        title: function(element) {
          return element.title;
        }
      }
    }
  };

  Element._attributeTranslations.write = {
    names: Object.extend({
      cellpadding: 'cellPadding',
      cellspacing: 'cellSpacing'
    }, Element._attributeTranslations.read.names),
    values: {
      checked: function(element, value) {
        element.checked = !!value;
      },

      style: function(element, value) {
        element.style.cssText = value ? value : '';
      }
    }
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
      'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
    Object.extend(v, {
      href:        v._getAttr,
      src:         v._getAttr,
      type:        v._getAttr,
      action:      v._getAttrNode,
      disabled:    v._flag,
      checked:     v._flag,
      readonly:    v._flag,
      multiple:    v._flag,
      onload:      v._getEv,
      onunload:    v._getEv,
      onclick:     v._getEv,
      ondblclick:  v._getEv,
      onmousedown: v._getEv,
      onmouseup:   v._getEv,
      onmouseover: v._getEv,
      onmousemove: v._getEv,
      onmouseout:  v._getEv,
      onfocus:     v._getEv,
      onblur:      v._getEv,
      onkeypress:  v._getEv,
      onkeydown:   v._getEv,
      onkeyup:     v._getEv,
      onsubmit:    v._getEv,
      onreset:     v._getEv,
      onselect:    v._getEv,
      onchange:    v._getEv
    });
  })(Element._attributeTranslations.read.values);
}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1) ? 0.999999 :
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
    return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;

    if (value == 1)
      if(element.tagName.toUpperCase() == 'IMG' && element.width) {
        element.width++; element.width--;
      } else try {
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
      } catch (e) { }

    return element;
  };

  Element.Methods.cumulativeOffset = function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      if (element.offsetParent == document.body)
        if (Element.getStyle(element, 'position') == 'absolute') break;

      element = element.offsetParent;
    } while (element);

    return Element._returnOffset(valueL, valueT);
  };
}

if (Prototype.Browser.IE || Prototype.Browser.Opera) {
  Element.Methods.update = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);

    content = Object.toHTML(content);
    var tagName = element.tagName.toUpperCase();

    if (tagName in Element._insertionTranslations.tags) {
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
    }
    else element.innerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

if ('outerHTML' in document.createElement('div')) {
  Element.Methods.replace = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) {
      element.parentNode.replaceChild(content, element);
      return element;
    }

    content = Object.toHTML(content);
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

    if (Element._insertionTranslations.tags[tagName]) {
      var nextSibling = element.next();
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
      parent.removeChild(element);
      if (nextSibling)
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
      else
        fragments.each(function(node) { parent.appendChild(node) });
    }
    else element.outerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
  if (t) {
    div.innerHTML = t[0] + html + t[1];
    t[2].times(function() { div = div.firstChild });
  } else div.innerHTML = html;
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: function(element, node) {
    element.parentNode.insertBefore(node, element);
  },
  top: function(element, node) {
    element.insertBefore(node, element.firstChild);
  },
  bottom: function(element, node) {
    element.appendChild(node);
  },
  after: function(element, node) {
    element.parentNode.insertBefore(node, element.nextSibling);
  },
  tags: {
    TABLE:  ['<table>',                '</table>',                   1],
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
    SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  Object.extend(this.tags, {
    THEAD: this.tags.TBODY,
    TFOOT: this.tags.TBODY,
    TH:    this.tags.TD
  });
}).call(Element._insertionTranslations);

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
    attribute = Element._attributeTranslations.has[attribute] || attribute;
    var node = $(element).getAttributeNode(attribute);
    return !!(node && node.specified);
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

(function(div) {

  if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {
    window.HTMLElement = { };
    window.HTMLElement.prototype = div['__proto__'];
    Prototype.BrowserFeatures.ElementExtensions = true;
  }

  div = null;

})(document.createElement('div'))

Element.extend = (function() {
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
    return Prototype.K;

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
    if (!element || element._extendedByPrototype ||
        element.nodeType != 1 || element == window) return element;

    var methods = Object.clone(Methods),
      tagName = element.tagName.toUpperCase(), property, value;

    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

    for (property in methods) {
      value = methods[property];
      if (Object.isFunction(value) && !(property in element))
        element[property] = value.methodize();
    }

    element._extendedByPrototype = Prototype.emptyFunction;
    return element;

  }, {
    refresh: function() {
      if (!Prototype.BrowserFeatures.ElementExtensions) {
        Object.extend(Methods, Element.Methods);
        Object.extend(Methods, Element.Methods.Simulated);
      }
    }
  });

  extend.refresh();
  return extend;
})();

Element.hasAttribute = function(element, attribute) {
  if (element.hasAttribute) return element.hasAttribute(attribute);
  return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
    Object.extend(Form, Form.Methods);
    Object.extend(Form.Element, Form.Element.Methods);
    Object.extend(Element.Methods.ByTag, {
      "FORM":     Object.clone(Form.Methods),
      "INPUT":    Object.clone(Form.Element.Methods),
      "SELECT":   Object.clone(Form.Element.Methods),
      "TEXTAREA": Object.clone(Form.Element.Methods)
    });
  }

  if (arguments.length == 2) {
    var tagName = methods;
    methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
    if (Object.isArray(tagName)) tagName.each(extend);
    else extend(tagName);
  }

  function extend(tagName) {
    tagName = tagName.toUpperCase();
    if (!Element.Methods.ByTag[tagName])
      Element.Methods.ByTag[tagName] = { };
    Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
    onlyIfAbsent = onlyIfAbsent || false;
    for (var property in methods) {
      var value = methods[property];
      if (!Object.isFunction(value)) continue;
      if (!onlyIfAbsent || !(property in destination))
        destination[property] = value.methodize();
    }
  }

  function findDOMClass(tagName) {
    var klass;
    var trans = {
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
      "FrameSet", "IFRAME": "IFrame"
    };
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName.capitalize() + 'Element';
    if (window[klass]) return window[klass];

    var element = document.createElement(tagName);
    var proto = element['__proto__'] || element.constructor.prototype;
    element = null;
    return proto;
  }

  var elementPrototype = window.HTMLElement ? HTMLElement.prototype :
   Element.prototype;

  if (F.ElementExtensions) {
    copy(Element.Methods, elementPrototype);
    copy(Element.Methods.Simulated, elementPrototype, true);
  }

  if (F.SpecificElementExtensions) {
    for (var tag in Element.Methods.ByTag) {
      var klass = findDOMClass(tag);
      if (Object.isUndefined(klass)) continue;
      copy(T[tag], klass.prototype);
    }
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};

document.viewport = {
  getDimensions: function() {
    return { width: this.getWidth(), height: this.getHeight() };
  },

  getScrollOffsets: function() {
    return Element._returnOffset(
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
      window.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop);
  }
};

(function(viewport) {
  var B = Prototype.Browser, doc = document, element, property = {};

  function getRootElement() {
    if (B.WebKit && !doc.evaluate)
      return document;

    if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)
      return document.body;

    return document.documentElement;
  }

  function define(D) {
    if (!element) element = getRootElement();

    property[D] = 'client' + D;

    viewport['get' + D] = function() { return element[property[D]] };
    return viewport['get' + D]();
  }

  viewport.getWidth  = define.curry('Width');
  viewport.getHeight = define.curry('Height');
})(document.viewport);


Element.Storage = {
  UID: 1
};

Element.addMethods({
  getStorage: function(element) {
    if (!(element = $(element))) return;

    var uid;
    if (element === window) {
      uid = 0;
    } else {
      if (Object.isUndefined(element._prototypeUID))
        element._prototypeUID = [Element.Storage.UID++];
      uid = element._prototypeUID[0];
    }

    if (!Element.Storage[uid])
      Element.Storage[uid] = $H();

    return Element.Storage[uid];
  },

  store: function(element, key, value) {
    if (!(element = $(element))) return;

    if (arguments.length === 2) {
      element.getStorage().update(key);
    } else {
      element.getStorage().set(key, value);
    }

    return element;
  },

  retrieve: function(element, key, defaultValue) {
    if (!(element = $(element))) return;
    var hash = Element.getStorage(element), value = hash.get(key);

    if (Object.isUndefined(value)) {
      hash.set(key, defaultValue);
      value = defaultValue;
    }

    return value;
  }
});
/* Portions of the Selector class are derived from Jack Slocum's DomQuery,
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
 * license.  Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
  initialize: function(expression) {
    this.expression = expression.strip();

    if (this.shouldUseSelectorsAPI()) {
      this.mode = 'selectorsAPI';
    } else if (this.shouldUseXPath()) {
      this.mode = 'xpath';
      this.compileXPathMatcher();
    } else {
      this.mode = "normal";
      this.compileMatcher();
    }

  },

  shouldUseXPath: function() {
    if (!Prototype.BrowserFeatures.XPath) return false;

    var e = this.expression;

    if (Prototype.Browser.WebKit &&
     (e.include("-of-type") || e.include(":empty")))
      return false;

    if ((/(\[[\w-]*?:|:checked)/).test(e))
      return false;

    return true;
  },

  shouldUseSelectorsAPI: function() {
    if (!Prototype.BrowserFeatures.SelectorsAPI) return false;

    if (Selector.CASE_INSENSITIVE_CLASS_NAMES) return false;

    if (!Selector._div) Selector._div = new Element('div');

    try {
      Selector._div.querySelector(this.expression);
    } catch(e) {
      return false;
    }

    return true;
  },

  compileMatcher: function() {
    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m, len = ps.length, name;

    if (Selector._cache[e]) {
      this.matcher = Selector._cache[e];
      return;
    }

    this.matcher = ["this.matcher = function(root) {",
                    "var r = root, h = Selector.handlers, c = false, n;"];

    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i = 0; i<len; i++) {
        p = ps[i].re;
        name = ps[i].name;
        if (m = e.match(p)) {
          this.matcher.push(Object.isFunction(c[name]) ? c[name](m) :
            new Template(c[name]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.matcher.push("return h.unique(n);\n}");
    eval(this.matcher.join('\n'));
    Selector._cache[this.expression] = this.matcher;
  },

  compileXPathMatcher: function() {
    var e = this.expression, ps = Selector.patterns,
        x = Selector.xpath, le, m, len = ps.length, name;

    if (Selector._cache[e]) {
      this.xpath = Selector._cache[e]; return;
    }

    this.matcher = ['.//*'];
    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i = 0; i<len; i++) {
        name = ps[i].name;
        if (m = e.match(ps[i].re)) {
          this.matcher.push(Object.isFunction(x[name]) ? x[name](m) :
            new Template(x[name]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.xpath = this.matcher.join('');
    Selector._cache[this.expression] = this.xpath;
  },

  findElements: function(root) {
    root = root || document;
    var e = this.expression, results;

    switch (this.mode) {
      case 'selectorsAPI':
        if (root !== document) {
          var oldId = root.id, id = $(root).identify();
          e = "#" + id + " " + e;
        }

        results = $A(root.querySelectorAll(e)).map(Element.extend);
        root.id = oldId;

        return results;
      case 'xpath':
        return document._getElementsByXPath(this.xpath, root);
      default:
       return this.matcher(root);
    }
  },

  match: function(element) {
    this.tokens = [];

    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
    var le, p, m, len = ps.length, name;

    while (e && le !== e && (/\S/).test(e)) {
      le = e;
      for (var i = 0; i<len; i++) {
        p = ps[i].re;
        name = ps[i].name;
        if (m = e.match(p)) {
          if (as[name]) {
            this.tokens.push([name, Object.clone(m)]);
            e = e.replace(m[0], '');
          } else {
            return this.findElements(document).include(element);
          }
        }
      }
    }

    var match = true, name, matches;
    for (var i = 0, token; token = this.tokens[i]; i++) {
      name = token[0], matches = token[1];
      if (!Selector.assertions[name](element, matches)) {
        match = false; break;
      }
    }

    return match;
  },

  toString: function() {
    return this.expression;
  },

  inspect: function() {
    return "#<Selector:" + this.expression.inspect() + ">";
  }
});

if (Prototype.BrowserFeatures.SelectorsAPI &&
 document.compatMode === 'BackCompat') {
  Selector.CASE_INSENSITIVE_CLASS_NAMES = (function(){
    var div = document.createElement('div'),
     span = document.createElement('span');

    div.id = "prototype_test_id";
    span.className = 'Test';
    div.appendChild(span);
    var isIgnored = (div.querySelector('#prototype_test_id .test') !== null);
    div = span = null;
    return isIgnored;
  })();
}

Object.extend(Selector, {
  _cache: { },

  xpath: {
    descendant:   "//*",
    child:        "/*",
    adjacent:     "/following-sibling::*[1]",
    laterSibling: '/following-sibling::*',
    tagName:      function(m) {
      if (m[1] == '*') return '';
      return "[local-name()='" + m[1].toLowerCase() +
             "' or local-name()='" + m[1].toUpperCase() + "']";
    },
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
    id:           "[@id='#{1}']",
    attrPresence: function(m) {
      m[1] = m[1].toLowerCase();
      return new Template("[@#{1}]").evaluate(m);
    },
    attr: function(m) {
      m[1] = m[1].toLowerCase();
      m[3] = m[5] || m[6];
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
    },
    pseudo: function(m) {
      var h = Selector.xpath.pseudos[m[1]];
      if (!h) return '';
      if (Object.isFunction(h)) return h(m);
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
    },
    operators: {
      '=':  "[@#{1}='#{3}']",
      '!=': "[@#{1}!='#{3}']",
      '^=': "[starts-with(@#{1}, '#{3}')]",
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
      '*=': "[contains(@#{1}, '#{3}')]",
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
    },
    pseudos: {
      'first-child': '[not(preceding-sibling::*)]',
      'last-child':  '[not(following-sibling::*)]',
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
      'empty':       "[count(*) = 0 and (count(text()) = 0)]",
      'checked':     "[@checked]",
      'disabled':    "[(@disabled) and (@type!='hidden')]",
      'enabled':     "[not(@disabled) and (@type!='hidden')]",
      'not': function(m) {
        var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, v, len = p.length, name;

        var exclusion = [];
        while (e && le != e && (/\S/).test(e)) {
          le = e;
          for (var i = 0; i<len; i++) {
            name = p[i].name
            if (m = e.match(p[i].re)) {
              v = Object.isFunction(x[name]) ? x[name](m) : new Template(x[name]).evaluate(m);
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
              e = e.replace(m[0], '');
              break;
            }
          }
        }
        return "[not(" + exclusion.join(" and ") + ")]";
      },
      'nth-child':      function(m) {
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
      },
      'nth-last-child': function(m) {
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
      },
      'nth-of-type':    function(m) {
        return Selector.xpath.pseudos.nth("position() ", m);
      },
      'nth-last-of-type': function(m) {
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
      },
      'first-of-type':  function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
      },
      'last-of-type':   function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
      },
      'only-of-type':   function(m) {
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
      },
      nth: function(fragment, m) {
        var mm, formula = m[6], predicate;
        if (formula == 'even') formula = '2n+0';
        if (formula == 'odd')  formula = '2n+1';
        if (mm = formula.match(/^(\d+)$/)) // digit only
          return '[' + fragment + "= " + mm[1] + ']';
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
          if (mm[1] == "-") mm[1] = -1;
          var a = mm[1] ? Number(mm[1]) : 1;
          var b = mm[2] ? Number(mm[2]) : 0;
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
          "((#{fragment} - #{b}) div #{a} >= 0)]";
          return new Template(predicate).evaluate({
            fragment: fragment, a: a, b: b });
        }
      }
    }
  },

  criteria: {
    tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
    className:    'n = h.className(n, r, "#{1}", c);    c = false;',
    id:           'n = h.id(n, r, "#{1}", c);           c = false;',
    attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
    attr: function(m) {
      m[3] = (m[5] || m[6]);
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
    },
    pseudo: function(m) {
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
    },
    descendant:   'c = "descendant";',
    child:        'c = "child";',
    adjacent:     'c = "adjacent";',
    laterSibling: 'c = "laterSibling";'
  },

  patterns: [
    { name: 'laterSibling', re: /^\s*~\s*/ },
    { name: 'child',        re: /^\s*>\s*/ },
    { name: 'adjacent',     re: /^\s*\+\s*/ },
    { name: 'descendant',   re: /^\s/ },

    { name: 'tagName',      re: /^\s*(\*|[\w\-]+)(\b|$)?/ },
    { name: 'id',           re: /^#([\w\-\*]+)(\b|$)/ },
    { name: 'className',    re: /^\.([\w\-\*]+)(\b|$)/ },
    { name: 'pseudo',       re: /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/ },
    { name: 'attrPresence', re: /^\[((?:[\w]+:)?[\w]+)\]/ },
    { name: 'attr',         re: /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/ }
  ],

  assertions: {
    tagName: function(element, matches) {
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
    },

    className: function(element, matches) {
      return Element.hasClassName(element, matches[1]);
    },

    id: function(element, matches) {
      return element.id === matches[1];
    },

    attrPresence: function(element, matches) {
      return Element.hasAttribute(element, matches[1]);
    },

    attr: function(element, matches) {
      var nodeValue = Element.readAttribute(element, matches[1]);
      return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
    }
  },

  handlers: {
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        a.push(node);
      return a;
    },

    mark: function(nodes) {
      var _true = Prototype.emptyFunction;
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = _true;
      return nodes;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = undefined;
      return nodes;
    },

    index: function(parentNode, reverse, ofType) {
      parentNode._countedByPrototype = Prototype.emptyFunction;
      if (reverse) {
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
          var node = nodes[i];
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
        }
      } else {
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
      }
    },

    unique: function(nodes) {
      if (nodes.length == 0) return nodes;
      var results = [], n;
      for (var i = 0, l = nodes.length; i < l; i++)
        if (!(n = nodes[i])._countedByPrototype) {
          n._countedByPrototype = Prototype.emptyFunction;
          results.push(Element.extend(n));
        }
      return Selector.handlers.unmark(results);
    },

    descendant: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, node.getElementsByTagName('*'));
      return results;
    },

    child: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        for (var j = 0, child; child = node.childNodes[j]; j++)
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
      }
      return results;
    },

    adjacent: function(nodes) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        var next = this.nextElementSibling(node);
        if (next) results.push(next);
      }
      return results;
    },

    laterSibling: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, Element.nextSiblings(node));
      return results;
    },

    nextElementSibling: function(node) {
      while (node = node.nextSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    previousElementSibling: function(node) {
      while (node = node.previousSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    tagName: function(nodes, root, tagName, combinator) {
      var uTagName = tagName.toUpperCase();
      var results = [], h = Selector.handlers;
      if (nodes) {
        if (combinator) {
          if (combinator == "descendant") {
            for (var i = 0, node; node = nodes[i]; i++)
              h.concat(results, node.getElementsByTagName(tagName));
            return results;
          } else nodes = this[combinator](nodes);
          if (tagName == "*") return nodes;
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
        return results;
      } else return root.getElementsByTagName(tagName);
    },

    id: function(nodes, root, id, combinator) {
      var targetNode = $(id), h = Selector.handlers;
      if (!targetNode) return [];
      if (!nodes && root == document) return [targetNode];
      if (nodes) {
        if (combinator) {
          if (combinator == 'child') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (targetNode.parentNode == node) return [targetNode];
          } else if (combinator == 'descendant') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Element.descendantOf(targetNode, node)) return [targetNode];
          } else if (combinator == 'adjacent') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Selector.handlers.previousElementSibling(targetNode) == node)
                return [targetNode];
          } else nodes = h[combinator](nodes);
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node == targetNode) return [targetNode];
        return [];
      }
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
    },

    className: function(nodes, root, className, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      return Selector.handlers.byClassName(nodes, root, className);
    },

    byClassName: function(nodes, root, className) {
      if (!nodes) nodes = Selector.handlers.descendant([root]);
      var needle = ' ' + className + ' ';
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
        nodeClassName = node.className;
        if (nodeClassName.length == 0) continue;
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
          results.push(node);
      }
      return results;
    },

    attrPresence: function(nodes, root, attr, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var results = [];
      for (var i = 0, node; node = nodes[i]; i++)
        if (Element.hasAttribute(node, attr)) results.push(node);
      return results;
    },

    attr: function(nodes, root, attr, value, operator, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var handler = Selector.operators[operator], results = [];
      for (var i = 0, node; node = nodes[i]; i++) {
        var nodeValue = Element.readAttribute(node, attr);
        if (nodeValue === null) continue;
        if (handler(nodeValue, value)) results.push(node);
      }
      return results;
    },

    pseudo: function(nodes, name, value, root, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      if (!nodes) nodes = root.getElementsByTagName("*");
      return Selector.pseudos[name](nodes, value, root);
    }
  },

  pseudos: {
    'first-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.previousElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'last-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.nextElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'only-child': function(nodes, value, root) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
          results.push(node);
      return results;
    },
    'nth-child':        function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root);
    },
    'nth-last-child':   function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true);
    },
    'nth-of-type':      function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, false, true);
    },
    'nth-last-of-type': function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true, true);
    },
    'first-of-type':    function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, false, true);
    },
    'last-of-type':     function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, true, true);
    },
    'only-of-type':     function(nodes, formula, root) {
      var p = Selector.pseudos;
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
    },

    getIndices: function(a, b, total) {
      if (a == 0) return b > 0 ? [b] : [];
      return $R(1, total).inject([], function(memo, i) {
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
        return memo;
      });
    },

    nth: function(nodes, formula, root, reverse, ofType) {
      if (nodes.length == 0) return [];
      if (formula == 'even') formula = '2n+0';
      if (formula == 'odd')  formula = '2n+1';
      var h = Selector.handlers, results = [], indexed = [], m;
      h.mark(nodes);
      for (var i = 0, node; node = nodes[i]; i++) {
        if (!node.parentNode._countedByPrototype) {
          h.index(node.parentNode, reverse, ofType);
          indexed.push(node.parentNode);
        }
      }
      if (formula.match(/^\d+$/)) { // just a number
        formula = Number(formula);
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.nodeIndex == formula) results.push(node);
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
        if (m[1] == "-") m[1] = -1;
        var a = m[1] ? Number(m[1]) : 1;
        var b = m[2] ? Number(m[2]) : 0;
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
          for (var j = 0; j < l; j++)
            if (node.nodeIndex == indices[j]) results.push(node);
        }
      }
      h.unmark(nodes);
      h.unmark(indexed);
      return results;
    },

    'empty': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (node.tagName == '!' || node.firstChild) continue;
        results.push(node);
      }
      return results;
    },

    'not': function(nodes, selector, root) {
      var h = Selector.handlers, selectorType, m;
      var exclusions = new Selector(selector).findElements(root);
      h.mark(exclusions);
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node._countedByPrototype) results.push(node);
      h.unmark(exclusions);
      return results;
    },

    'enabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node.disabled && (!node.type || node.type !== 'hidden'))
          results.push(node);
      return results;
    },

    'disabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.disabled) results.push(node);
      return results;
    },

    'checked': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.checked) results.push(node);
      return results;
    }
  },

  operators: {
    '=':  function(nv, v) { return nv == v; },
    '!=': function(nv, v) { return nv != v; },
    '^=': function(nv, v) { return nv == v || nv && nv.startsWith(v); },
    '$=': function(nv, v) { return nv == v || nv && nv.endsWith(v); },
    '*=': function(nv, v) { return nv == v || nv && nv.include(v); },
    '$=': function(nv, v) { return nv.endsWith(v); },
    '*=': function(nv, v) { return nv.include(v); },
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
    '|=': function(nv, v) { return ('-' + (nv || "").toUpperCase() +
     '-').include('-' + (v || "").toUpperCase() + '-'); }
  },

  split: function(expression) {
    var expressions = [];
    expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
      expressions.push(m[1].strip());
    });
    return expressions;
  },

  matchElements: function(elements, expression) {
    var matches = $$(expression), h = Selector.handlers;
    h.mark(matches);
    for (var i = 0, results = [], element; element = elements[i]; i++)
      if (element._countedByPrototype) results.push(element);
    h.unmark(matches);
    return results;
  },

  findElement: function(elements, expression, index) {
    if (Object.isNumber(expression)) {
      index = expression; expression = false;
    }
    return Selector.matchElements(elements, expression || '*')[index || 0];
  },

  findChildElements: function(element, expressions) {
    expressions = Selector.split(expressions.join(','));
    var results = [], h = Selector.handlers;
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
      selector = new Selector(expressions[i].strip());
      h.concat(results, selector.findElements(element));
    }
    return (l > 1) ? h.unique(results) : results;
  }
});

if (Prototype.Browser.IE) {
  Object.extend(Selector.handlers, {
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        if (node.tagName !== "!") a.push(node);
      return a;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node.removeAttribute('_countedByPrototype');
      return nodes;
    }
  });
}

function $$() {
  return Selector.findChildElements(document, $A(arguments));
}
var Form = {
  reset: function(form) {
    $(form).reset();
    return form;
  },

  serializeElements: function(elements, options) {
    if (typeof options != 'object') options = { hash: !!options };
    else if (Object.isUndefined(options.hash)) options.hash = true;
    var key, value, submitted = false, submit = options.submit;

    var data = elements.inject({ }, function(result, element) {
      if (!element.disabled && element.name) {
        key = element.name; value = $(element).getValue();
        if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
          if (key in result) {
            if (!Object.isArray(result[key])) result[key] = [result[key]];
            result[key].push(value);
          }
          else result[key] = value;
        }
      }
      return result;
    });

    return options.hash ? data : Object.toQueryString(data);
  }
};

Form.Methods = {
  serialize: function(form, options) {
    return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
    return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child) {
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
          elements.push(Element.extend(child));
        return elements;
      }
    );
  },

  getInputs: function(form, typeName, name) {
    form = $(form);
    var inputs = form.getElementsByTagName('input');

    if (!typeName && !name) return $A(inputs).map(Element.extend);

    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
      var input = inputs[i];
      if ((typeName && input.type != typeName) || (name && input.name != name))
        continue;
      matchingInputs.push(Element.extend(input));
    }

    return matchingInputs;
  },

  disable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('disable');
    return form;
  },

  enable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('enable');
    return form;
  },

  findFirstElement: function(form) {
    var elements = $(form).getElements().findAll(function(element) {
      return 'hidden' != element.type && !element.disabled;
    });
    var firstByIndex = elements.findAll(function(element) {
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
    }).sortBy(function(element) { return element.tabIndex }).first();

    return firstByIndex ? firstByIndex : elements.find(function(element) {
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    form = $(form);
    form.findFirstElement().activate();
    return form;
  },

  request: function(form, options) {
    form = $(form), options = Object.clone(options || { });

    var params = options.parameters, action = form.readAttribute('action') || '';
    if (action.blank()) action = window.location.href;
    options.parameters = form.serialize(true);

    if (params) {
      if (Object.isString(params)) params = params.toQueryParams();
      Object.extend(options.parameters, params);
    }

    if (form.hasAttribute('method') && !options.method)
      options.method = form.method;

    return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/

Form.Element = {
  focus: function(element) {
    $(element).focus();
    return element;
  },

  select: function(element) {
    $(element).select();
    return element;
  }
};

Form.Element.Methods = {
  serialize: function(element) {
    element = $(element);
    if (!element.disabled && element.name) {
      var value = element.getValue();
      if (value != undefined) {
        var pair = { };
        pair[element.name] = value;
        return Object.toQueryString(pair);
      }
    }
    return '';
  },

  getValue: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    Form.Element.Serializers[method](element, value);
    return element;
  },

  clear: function(element) {
    $(element).value = '';
    return element;
  },

  present: function(element) {
    return $(element).value != '';
  },

  activate: function(element) {
    element = $(element);
    try {
      element.focus();
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
          !['button', 'reset', 'submit'].include(element.type)))
        element.select();
    } catch (e) { }
    return element;
  },

  disable: function(element) {
    element = $(element);
    element.disabled = true;
    return element;
  },

  enable: function(element) {
    element = $(element);
    element.disabled = false;
    return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;
var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = {
  input: function(element, value) {
    switch (element.type.toLowerCase()) {
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element, value);
      default:
        return Form.Element.Serializers.textarea(element, value);
    }
  },

  inputSelector: function(element, value) {
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
    else element.checked = !!value;
  },

  textarea: function(element, value) {
    if (Object.isUndefined(value)) return element.value;
    else element.value = value;
  },

  select: function(element, value) {
    if (Object.isUndefined(value))
      return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
    else {
      var opt, currentValue, single = !Object.isArray(value);
      for (var i = 0, length = element.length; i < length; i++) {
        opt = element.options[i];
        currentValue = this.optionValue(opt);
        if (single) {
          if (currentValue == value) {
            opt.selected = true;
            return;
          }
        }
        else opt.selected = value.include(currentValue);
      }
    }
  },

  selectOne: function(element) {
    var index = element.selectedIndex;
    return index >= 0 ? this.optionValue(element.options[index]) : null;
  },

  selectMany: function(element) {
    var values, length = element.length;
    if (!length) return null;

    for (var i = 0, values = []; i < length; i++) {
      var opt = element.options[i];
      if (opt.selected) values.push(this.optionValue(opt));
    }
    return values;
  },

  optionValue: function(opt) {
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
  }
};

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
    $super(callback, frequency);
    this.element   = $(element);
    this.lastValue = this.getValue();
  },

  execute: function() {
    var value = this.getValue();
    if (Object.isString(this.lastValue) && Object.isString(value) ?
        this.lastValue != value : String(this.lastValue) != String(value)) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
    this.element  = $(element);
    this.callback = callback;

    this.lastValue = this.getValue();
    if (this.element.tagName.toLowerCase() == 'form')
      this.registerFormCallbacks();
    else
      this.registerCallback(this.element);
  },

  onElementEvent: function() {
    var value = this.getValue();
    if (this.lastValue != value) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  },

  registerFormCallbacks: function() {
    Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        default:
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});
(function() {
  var Event = {
    KEY_BACKSPACE: 8,
    KEY_TAB:       9,
    KEY_RETURN:   13,
    KEY_ESC:      27,
    KEY_LEFT:     37,
    KEY_UP:       38,
    KEY_RIGHT:    39,
    KEY_DOWN:     40,
    KEY_DELETE:   46,
    KEY_HOME:     36,
    KEY_END:      35,
    KEY_PAGEUP:   33,
    KEY_PAGEDOWN: 34,
    KEY_INSERT:   45,

    cache: {}
  };

  var _isButton;
  if (Prototype.Browser.IE) {
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
    _isButton = function(event, code) {
      return event.button === buttonMap[code];
    };
  } else if (Prototype.Browser.WebKit) {
    _isButton = function(event, code) {
      switch (code) {
        case 0: return event.which == 1 && !event.metaKey;
        case 1: return event.which == 1 && event.metaKey;
        default: return false;
      }
    };
  } else {
    _isButton = function(event, code) {
      return event.which ? (event.which === code + 1) : (event.button === code);
    };
  }

  function isLeftClick(event)   { return _isButton(event, 0) }
  function isMiddleClick(event) { return _isButton(event, 1) }
  function isRightClick(event)  { return _isButton(event, 2) }

  function element(event) {
    event = Event.extend(event);

    var node = event.target, type = event.type,
     currentTarget = event.currentTarget;

    if (currentTarget && currentTarget.tagName) {
      if (type === 'load' || type === 'error' ||
        (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
          && currentTarget.type === 'radio'))
            node = currentTarget;
    }

    if (node.nodeType == Node.TEXT_NODE)
      node = node.parentNode;

    return Element.extend(node);
  }

  function findElement(event, expression) {
    var element = Event.element(event);
    if (!expression) return element;
    var elements = [element].concat(element.ancestors());
    return Selector.findElement(elements, expression, 0);
  }

  function pointer(event) {
    var docElement = document.documentElement,
     body = document.body || { scrollLeft: 0, scrollTop: 0 };
    return {
      x: event.pageX || (event.clientX +
        (docElement.scrollLeft || body.scrollLeft) -
        (docElement.clientLeft || 0)),
      y: event.pageY || (event.clientY +
        (docElement.scrollTop || body.scrollTop) -
        (docElement.clientTop || 0))
    };
  }

  function pointerX(event) { return Event.pointer(event).x }
  function pointerY(event) { return Event.pointer(event).y }

  function stop(event) {
    Event.extend(event);
    event.preventDefault();
    event.stopPropagation();

    event.stopped = true;
  }

  Event.Methods = {
    isLeftClick: isLeftClick,
    isMiddleClick: isMiddleClick,
    isRightClick: isRightClick,

    element: element,
    findElement: findElement,

    pointer: pointer,
    pointerX: pointerX,
    pointerY: pointerY,

    stop: stop
  };


  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
    m[name] = Event.Methods[name].methodize();
    return m;
  });

  if (Prototype.Browser.IE) {
    function _relatedTarget(event) {
      var element;
      switch (event.type) {
        case 'mouseover': element = event.fromElement; break;
        case 'mouseout':  element = event.toElement;   break;
        default: return null;
      }
      return Element.extend(element);
    }

    Object.extend(methods, {
      stopPropagation: function() { this.cancelBubble = true },
      preventDefault:  function() { this.returnValue = false },
      inspect: function() { return '[object Event]' }
    });

    Event.extend = function(event) {
      if (!event) return false;
      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;
      var pointer = Event.pointer(event);
      Object.extend(event, {
        target: event.srcElement,
        relatedTarget: _relatedTarget(event),
        pageX:  pointer.x,
        pageY:  pointer.y
      });
      return Object.extend(event, methods);
    };
  } else {
    Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
    Object.extend(Event.prototype, methods);
    Event.extend = Prototype.K;
  }

  function _createResponder(element, eventName, handler) {
    var registry = Element.retrieve(element, 'prototype_event_registry');

    if (Object.isUndefined(registry)) {
      CACHE.push(element);
      registry = Element.retrieve(element, 'prototype_event_registry', $H());
    }

    var respondersForEvent = registry.get(eventName);
    if (Object.isUndefined()) {
      respondersForEvent = [];
      registry.set(eventName, respondersForEvent);
    }

    if (respondersForEvent.pluck('handler').include(handler)) return false;

    var responder;
    if (eventName.include(":")) {
      responder = function(event) {
        if (Object.isUndefined(event.eventName))
          return false;

        if (event.eventName !== eventName)
          return false;

        Event.extend(event);
        handler.call(element, event);
      };
    } else {
      responder = function(event) {
        Event.extend(event);
        handler.call(element, event);
      };
    }

    responder.handler = handler;
    respondersForEvent.push(responder);
    return responder;
  }

  function _destroyCache() {
    for (var i = 0, length = CACHE.length; i < length; i++)
      Event.stopObserving(CACHE[i]);
  }

  var CACHE = [];

  if (Prototype.Browser.IE)
    window.attachEvent('onunload', _destroyCache);

  if (Prototype.Browser.WebKit)
    window.addEventListener('unload', Prototype.emptyFunction, false);


  function observe(element, eventName, handler) {
    element = $(element);

    var responder = _createResponder(element, eventName, handler);

    if (!responder) return element;

    if (eventName.include(':')) {
      if (element.addEventListener)
        element.addEventListener("dataavailable", responder, false);
      else {
        element.attachEvent("ondataavailable", responder);
        element.attachEvent("onfilterchange", responder);
      }
    } else {
      if (element.addEventListener)
        element.addEventListener(eventName, responder, false);
      else
        element.attachEvent("on" + eventName, responder);
    }

    return element;
  }

  function stopObserving(element, eventName, handler) {
    element = $(element);

    var registry = Element.retrieve(element, 'prototype_event_registry');

    if (Object.isUndefined(registry)) return element;

    if (eventName && !handler) {
      var responders = registry.get(eventName);

      if (Object.isUndefined(responders)) return element;

      responders.each( function(r) {
        Element.stopObserving(element, eventName, r.handler);
      });
      return element;
    } else if (!eventName) {
      registry.each( function(pair) {
        var eventName = pair.key, responders = pair.value;

        responders.each( function(r) {
          Element.stopObserving(element, eventName, r.handler);
        });
      });
      return element;
    }

    var responders = registry.get(eventName);
    var responder = responders.find( function(r) { return r.handler === handler; });
    if (!responder) return element;

    if (eventName.include(':')) {
      if (element.removeEventListener)
        element.removeEventListener("dataavailable", responder, false);
      else {
        element.detachEvent("ondataavailable", responder);
        element.detachEvent("onfilterchange",  responder);
      }
    } else {
      if (element.removeEventListener)
        element.removeEventListener(eventName, responder, false);
      else
        element.detachEvent('on' + eventName, responder);
    }

    registry.set(eventName, responders.without(responder));

    return element;
  }

  function fire(element, eventName, memo, bubble) {
    element = $(element);

    if (Object.isUndefined(bubble))
      bubble = true;

    if (element == document && document.createEvent && !element.dispatchEvent)
      element = document.documentElement;

    var event;
    if (document.createEvent) {
      event = document.createEvent('HTMLEvents');
      event.initEvent('dataavailable', true, true);
    } else {
      event = document.createEventObject();
      event.eventType = bubble ? 'ondataavailable' : 'onfilterchange';
    }

    event.eventName = eventName;
    event.memo = memo || { };

    if (document.createEvent)
      element.dispatchEvent(event);
    else
      element.fireEvent(event.eventType, event);

    return Event.extend(event);
  }


  Object.extend(Event, Event.Methods);

  Object.extend(Event, {
    fire:          fire,
    observe:       observe,
    stopObserving: stopObserving
  });

  Element.addMethods({
    fire:          fire,
    observe:       observe,
    stopObserving: stopObserving
  });

  Object.extend(document, {
    fire:          fire.methodize(),
    observe:       observe.methodize(),
    stopObserving: stopObserving.methodize(),
    loaded:        false
  });

  if (window.Event) Object.extend(window.Event, Event);
  else window.Event = Event;
})();

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */

  var timer;

  function fireContentLoadedEvent() {
    if (document.loaded) return;
    if (timer) window.clearTimeout(timer);
    document.loaded = true;
    document.fire('dom:loaded');
  }

  function checkReadyState() {
    if (document.readyState === 'complete') {
      document.stopObserving('readystatechange', checkReadyState);
      fireContentLoadedEvent();
    }
  }

  function pollDoScroll() {
    try { document.documentElement.doScroll('left'); }
    catch(e) {
      timer = pollDoScroll.defer();
      return;
    }
    fireContentLoadedEvent();
  }

  if (document.addEventListener) {
    document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
  } else {
    document.observe('readystatechange', checkReadyState);
    if (window === top)
      timer = pollDoScroll.defer();
  }

  Event.observe(window, 'load', fireContentLoadedEvent);
})();

Element.addMethods();

/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
    return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
    return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
    return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
    return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

var Position = {
  includeScrollOffsets: false,

  prepare: function() {
    this.deltaX =  window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
    this.deltaY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
  },

  within: function(element, x, y) {
    if (this.includeScrollOffsets)
      return this.withinIncludingScrolloffsets(element, x, y);
    this.xcomp = x;
    this.ycomp = y;
    this.offset = Element.cumulativeOffset(element);

    return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
    var offsetcache = Element.cumulativeScrollOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = Element.cumulativeOffset(element);

    return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  overlap: function(mode, element) {
    if (!mode) return 0;
    if (mode == 'vertical')
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
        element.offsetHeight;
    if (mode == 'horizontal')
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
        element.offsetWidth;
  },


  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
    Position.prepare();
    return Element.absolutize(element);
  },

  relativize: function(element) {
    Position.prepare();
    return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
    options = options || { };
    return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
    className = className.toString().strip();
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
    className = className.toString().strip();
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
    if (!classNames && !className) return elements;

    var nodes = $(element).getElementsByTagName('*');
    className = ' ' + className + ' ';

    for (var i = 0, child, cn; child = nodes[i]; i++) {
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
          (classNames && classNames.all(function(name) {
            return !name.toString().blank() && cn.include(' ' + name + ' ');
          }))))
        elements.push(Element.extend(child));
    }
    return elements;
  };

  return function(className, parentElement) {
    return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
    this.element = $(element);
  },

  _each: function(iterator) {
    this.element.className.split(/\s+/).select(function(name) {
      return name.length > 0;
    })._each(iterator);
  },

  set: function(className) {
    this.element.className = className;
  },

  add: function(classNameToAdd) {
    if (this.include(classNameToAdd)) return;
    this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
    return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

String.prototype.parseColor = function() {
  var color = '#';
  if (this.slice(0,4) == 'rgb(') {
    var cols = this.slice(4,this.length-1).split(',');
    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);
  } else {
    if (this.slice(0,1) == '#') {
      if (this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();
      if (this.length==7) color = this.toLowerCase();
    }
  }
  return (color.length==7 ? color : (arguments[0] || this));
};

/*--------------------------------------------------------------------------*/

Element.collectTextNodes = function(element) {
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue :
      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
  }).flatten().join('');
};

Element.collectTextNodesIgnoreClass = function(element, className) {
  return $A($(element).childNodes).collect( function(node) {
    return (node.nodeType==3 ? node.nodeValue :
      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ?
        Element.collectTextNodesIgnoreClass(node, className) : ''));
  }).flatten().join('');
};

Element.setContentZoom = function(element, percent) {
  element = $(element);
  element.setStyle({fontSize: (percent/100) + 'em'});
  if (Prototype.Browser.WebKit) window.scrollBy(0,0);
  return element;
};

Element.getInlineOpacity = function(element){
  return $(element).style.opacity || '';
};

Element.forceRerendering = function(element) {
  try {
    element = $(element);
    var n = document.createTextNode(' ');
    element.appendChild(n);
    element.removeChild(n);
  } catch(e) { }
};

/*--------------------------------------------------------------------------*/

var Effect = {
  _elementDoesNotExistError: {
    name: 'ElementDoesNotExistError',
    message: 'The specified DOM element does not exist, but is required for this effect to operate'
  },
  Transitions: {
    linear: Prototype.K,
    sinoidal: function(pos) {
      return (-Math.cos(pos*Math.PI)/2) + .5;
    },
    reverse: function(pos) {
      return 1-pos;
    },
    flicker: function(pos) {
      var pos = ((-Math.cos(pos*Math.PI)/4) + .75) + Math.random()/4;
      return pos > 1 ? 1 : pos;
    },
    wobble: function(pos) {
      return (-Math.cos(pos*Math.PI*(9*pos))/2) + .5;
    },
    pulse: function(pos, pulses) {
      return (-Math.cos((pos*((pulses||5)-.5)*2)*Math.PI)/2) + .5;
    },
    spring: function(pos) {
      return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6));
    },
    none: function(pos) {
      return 0;
    },
    full: function(pos) {
      return 1;
    }
  },
  DefaultOptions: {
    duration:   1.0,   // seconds
    fps:        100,   // 100= assume 66fps max.
    sync:       false, // true for combining
    from:       0.0,
    to:         1.0,
    delay:      0.0,
    queue:      'parallel'
  },
  tagifyText: function(element) {
    var tagifyStyle = 'position:relative';
    if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';

    element = $(element);
    $A(element.childNodes).each( function(child) {
      if (child.nodeType==3) {
        child.nodeValue.toArray().each( function(character) {
          element.insertBefore(
            new Element('span', {style: tagifyStyle}).update(
              character == ' ' ? String.fromCharCode(160) : character),
              child);
        });
        Element.remove(child);
      }
    });
  },
  multiple: function(element, effect) {
    var elements;
    if (((typeof element == 'object') ||
        Object.isFunction(element)) &&
       (element.length))
      elements = element;
    else
      elements = $(element).childNodes;

    var options = Object.extend({
      speed: 0.1,
      delay: 0.0
    }, arguments[2] || { });
    var masterDelay = options.delay;

    $A(elements).each( function(element, index) {
      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
    });
  },
  PAIRS: {
    'slide':  ['SlideDown','SlideUp'],
    'blind':  ['BlindDown','BlindUp'],
    'appear': ['Appear','Fade']
  },
  toggle: function(element, effect) {
    element = $(element);
    effect = (effect || 'appear').toLowerCase();
    var options = Object.extend({
      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
    }, arguments[2] || { });
    Effect[element.visible() ?
      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
  }
};

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create(Enumerable, {
  initialize: function() {
    this.effects  = [];
    this.interval = null;
  },
  _each: function(iterator) {
    this.effects._each(iterator);
  },
  add: function(effect) {
    var timestamp = new Date().getTime();

    var position = Object.isString(effect.options.queue) ?
      effect.options.queue : effect.options.queue.position;

    switch(position) {
      case 'front':
        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
            e.startOn  += effect.finishOn;
            e.finishOn += effect.finishOn;
          });
        break;
      case 'with-last':
        timestamp = this.effects.pluck('startOn').max() || timestamp;
        break;
      case 'end':
        timestamp = this.effects.pluck('finishOn').max() || timestamp;
        break;
    }

    effect.startOn  += timestamp;
    effect.finishOn += timestamp;

    if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
      this.effects.push(effect);

    if (!this.interval)
      this.interval = setInterval(this.loop.bind(this), 15);
  },
  remove: function(effect) {
    this.effects = this.effects.reject(function(e) { return e==effect });
    if (this.effects.length == 0) {
      clearInterval(this.interval);
      this.interval = null;
    }
  },
  loop: function() {
    var timePos = new Date().getTime();
    for(var i=0, len=this.effects.length;i<len;i++)
      this.effects[i] && this.effects[i].loop(timePos);
  }
});

Effect.Queues = {
  instances: $H(),
  get: function(queueName) {
    if (!Object.isString(queueName)) return queueName;

    return this.instances.get(queueName) ||
      this.instances.set(queueName, new Effect.ScopedQueue());
  }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
  position: null,
  start: function(options) {
    if (options && options.transition === false) options.transition = Effect.Transitions.linear;
    this.options      = Object.extend(Object.extend({ },Effect.DefaultOptions), options || { });
    this.currentFrame = 0;
    this.state        = 'idle';
    this.startOn      = this.options.delay*1000;
    this.finishOn     = this.startOn+(this.options.duration*1000);
    this.fromToDelta  = this.options.to-this.options.from;
    this.totalTime    = this.finishOn-this.startOn;
    this.totalFrames  = this.options.fps*this.options.duration;

    this.render = (function() {
      function dispatch(effect, eventName) {
        if (effect.options[eventName + 'Internal'])
          effect.options[eventName + 'Internal'](effect);
        if (effect.options[eventName])
          effect.options[eventName](effect);
      }

      return function(pos) {
        if (this.state === "idle") {
          this.state = "running";
          dispatch(this, 'beforeSetup');
          if (this.setup) this.setup();
          dispatch(this, 'afterSetup');
        }
        if (this.state === "running") {
          pos = (this.options.transition(pos) * this.fromToDelta) + this.options.from;
          this.position = pos;
          dispatch(this, 'beforeUpdate');
          if (this.update) this.update(pos);
          dispatch(this, 'afterUpdate');
        }
      };
    })();

    this.event('beforeStart');
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ?
        'global' : this.options.queue.scope).add(this);
  },
  loop: function(timePos) {
    if (timePos >= this.startOn) {
      if (timePos >= this.finishOn) {
        this.render(1.0);
        this.cancel();
        this.event('beforeFinish');
        if (this.finish) this.finish();
        this.event('afterFinish');
        return;
      }
      var pos   = (timePos - this.startOn) / this.totalTime,
          frame = (pos * this.totalFrames).round();
      if (frame > this.currentFrame) {
        this.render(pos);
        this.currentFrame = frame;
      }
    }
  },
  cancel: function() {
    if (!this.options.sync)
      Effect.Queues.get(Object.isString(this.options.queue) ?
        'global' : this.options.queue.scope).remove(this);
    this.state = 'finished';
  },
  event: function(eventName) {
    if (this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
    if (this.options[eventName]) this.options[eventName](this);
  },
  inspect: function() {
    var data = $H();
    for(property in this)
      if (!Object.isFunction(this[property])) data.set(property, this[property]);
    return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
  }
});

Effect.Parallel = Class.create(Effect.Base, {
  initialize: function(effects) {
    this.effects = effects || [];
    this.start(arguments[1]);
  },
  update: function(position) {
    this.effects.invoke('render', position);
  },
  finish: function(position) {
    this.effects.each( function(effect) {
      effect.render(1.0);
      effect.cancel();
      effect.event('beforeFinish');
      if (effect.finish) effect.finish(position);
      effect.event('afterFinish');
    });
  }
});

Effect.Tween = Class.create(Effect.Base, {
  initialize: function(object, from, to) {
    object = Object.isString(object) ? $(object) : object;
    var args = $A(arguments), method = args.last(),
      options = args.length == 5 ? args[3] : null;
    this.method = Object.isFunction(method) ? method.bind(object) :
      Object.isFunction(object[method]) ? object[method].bind(object) :
      function(value) { object[method] = value };
    this.start(Object.extend({ from: from, to: to }, options || { }));
  },
  update: function(position) {
    this.method(position);
  }
});

Effect.Event = Class.create(Effect.Base, {
  initialize: function() {
    this.start(Object.extend({ duration: 0 }, arguments[0] || { }));
  },
  update: Prototype.emptyFunction
});

Effect.Opacity = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
      this.element.setStyle({zoom: 1});
    var options = Object.extend({
      from: this.element.getOpacity() || 0.0,
      to:   1.0
    }, arguments[1] || { });
    this.start(options);
  },
  update: function(position) {
    this.element.setOpacity(position);
  }
});

Effect.Move = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      x:    0,
      y:    0,
      mode: 'relative'
    }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    this.element.makePositioned();
    this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
    this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
    if (this.options.mode == 'absolute') {
      this.options.x = this.options.x - this.originalLeft;
      this.options.y = this.options.y - this.originalTop;
    }
  },
  update: function(position) {
    this.element.setStyle({
      left: (this.options.x  * position + this.originalLeft).round() + 'px',
      top:  (this.options.y  * position + this.originalTop).round()  + 'px'
    });
  }
});

Effect.MoveBy = function(element, toTop, toLeft) {
  return new Effect.Move(element,
    Object.extend({ x: toLeft, y: toTop }, arguments[3] || { }));
};

Effect.Scale = Class.create(Effect.Base, {
  initialize: function(element, percent) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      scaleX: true,
      scaleY: true,
      scaleContent: true,
      scaleFromCenter: false,
      scaleMode: 'box',        // 'box' or 'contents' or { } with provided values
      scaleFrom: 100.0,
      scaleTo:   percent
    }, arguments[2] || { });
    this.start(options);
  },
  setup: function() {
    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
    this.elementPositioning = this.element.getStyle('position');

    this.originalStyle = { };
    ['top','left','width','height','fontSize'].each( function(k) {
      this.originalStyle[k] = this.element.style[k];
    }.bind(this));

    this.originalTop  = this.element.offsetTop;
    this.originalLeft = this.element.offsetLeft;

    var fontSize = this.element.getStyle('font-size') || '100%';
    ['em','px','%','pt'].each( function(fontSizeType) {
      if (fontSize.indexOf(fontSizeType)>0) {
        this.fontSize     = parseFloat(fontSize);
        this.fontSizeType = fontSizeType;
      }
    }.bind(this));

    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;

    this.dims = null;
    if (this.options.scaleMode=='box')
      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
    if (/^content/.test(this.options.scaleMode))
      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
    if (!this.dims)
      this.dims = [this.options.scaleMode.originalHeight,
                   this.options.scaleMode.originalWidth];
  },
  update: function(position) {
    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
    if (this.options.scaleContent && this.fontSize)
      this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
  },
  finish: function(position) {
    if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
  },
  setDimensions: function(height, width) {
    var d = { };
    if (this.options.scaleX) d.width = width.round() + 'px';
    if (this.options.scaleY) d.height = height.round() + 'px';
    if (this.options.scaleFromCenter) {
      var topd  = (height - this.dims[0])/2;
      var leftd = (width  - this.dims[1])/2;
      if (this.elementPositioning == 'absolute') {
        if (this.options.scaleY) d.top = this.originalTop-topd + 'px';
        if (this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
      } else {
        if (this.options.scaleY) d.top = -topd + 'px';
        if (this.options.scaleX) d.left = -leftd + 'px';
      }
    }
    this.element.setStyle(d);
  }
});

Effect.Highlight = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || { });
    this.start(options);
  },
  setup: function() {
    if (this.element.getStyle('display')=='none') { this.cancel(); return; }
    this.oldStyle = { };
    if (!this.options.keepBackgroundImage) {
      this.oldStyle.backgroundImage = this.element.getStyle('background-image');
      this.element.setStyle({backgroundImage: 'none'});
    }
    if (!this.options.endcolor)
      this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
    if (!this.options.restorecolor)
      this.options.restorecolor = this.element.getStyle('background-color');
    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
    this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
  },
  update: function(position) {
    this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
      return m+((this._base[i]+(this._delta[i]*position)).round().toColorPart()); }.bind(this)) });
  },
  finish: function() {
    this.element.setStyle(Object.extend(this.oldStyle, {
      backgroundColor: this.options.restorecolor
    }));
  }
});

Effect.ScrollTo = function(element) {
  var options = arguments[1] || { },
  scrollOffsets = document.viewport.getScrollOffsets(),
  elementOffsets = $(element).cumulativeOffset();

  if (options.offset) elementOffsets[1] += options.offset;

  return new Effect.Tween(null,
    scrollOffsets.top,
    elementOffsets[1],
    options,
    function(p){ scrollTo(scrollOffsets.left, p.round()); }
  );
};

/* ------------- combination effects ------------- */

Effect.Fade = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  var options = Object.extend({
    from: element.getOpacity() || 1.0,
    to:   0.0,
    afterFinishInternal: function(effect) {
      if (effect.options.to!=0) return;
      effect.element.hide().setStyle({opacity: oldOpacity});
    }
  }, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Appear = function(element) {
  element = $(element);
  var options = Object.extend({
  from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
  to:   1.0,
  afterFinishInternal: function(effect) {
    effect.element.forceRerendering();
  },
  beforeSetup: function(effect) {
    effect.element.setOpacity(effect.options.from).show();
  }}, arguments[1] || { });
  return new Effect.Opacity(element,options);
};

Effect.Puff = function(element) {
  element = $(element);
  var oldStyle = {
    opacity: element.getInlineOpacity(),
    position: element.getStyle('position'),
    top:  element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height
  };
  return new Effect.Parallel(
   [ new Effect.Scale(element, 200,
      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }),
     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ],
     Object.extend({ duration: 1.0,
      beforeSetupInternal: function(effect) {
        Position.absolutize(effect.effects[0].element);
      },
      afterFinishInternal: function(effect) {
         effect.effects[0].element.hide().setStyle(oldStyle); }
     }, arguments[1] || { })
   );
};

Effect.BlindUp = function(element) {
  element = $(element);
  element.makeClipping();
  return new Effect.Scale(element, 0,
    Object.extend({ scaleContent: false,
      scaleX: false,
      restoreAfterFinish: true,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping();
      }
    }, arguments[1] || { })
  );
};

Effect.BlindDown = function(element) {
  element = $(element);
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({
    scaleContent: false,
    scaleX: false,
    scaleFrom: 0,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makeClipping().setStyle({height: '0px'}).show();
    },
    afterFinishInternal: function(effect) {
      effect.element.undoClipping();
    }
  }, arguments[1] || { }));
};

Effect.SwitchOff = function(element) {
  element = $(element);
  var oldOpacity = element.getInlineOpacity();
  return new Effect.Appear(element, Object.extend({
    duration: 0.4,
    from: 0,
    transition: Effect.Transitions.flicker,
    afterFinishInternal: function(effect) {
      new Effect.Scale(effect.element, 1, {
        duration: 0.3, scaleFromCenter: true,
        scaleX: false, scaleContent: false, restoreAfterFinish: true,
        beforeSetup: function(effect) {
          effect.element.makePositioned().makeClipping();
        },
        afterFinishInternal: function(effect) {
          effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
        }
      });
    }
  }, arguments[1] || { }));
};

Effect.DropOut = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left'),
    opacity: element.getInlineOpacity() };
  return new Effect.Parallel(
    [ new Effect.Move(element, {x: 0, y: 100, sync: true }),
      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
    Object.extend(
      { duration: 0.5,
        beforeSetup: function(effect) {
          effect.effects[0].element.makePositioned();
        },
        afterFinishInternal: function(effect) {
          effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
        }
      }, arguments[1] || { }));
};

Effect.Shake = function(element) {
  element = $(element);
  var options = Object.extend({
    distance: 20,
    duration: 0.5
  }, arguments[1] || {});
  var distance = parseFloat(options.distance);
  var split = parseFloat(options.duration) / 10.0;
  var oldStyle = {
    top: element.getStyle('top'),
    left: element.getStyle('left') };
    return new Effect.Move(element,
      { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
    new Effect.Move(effect.element,
      { x: -distance, y: 0, duration: split, afterFinishInternal: function(effect) {
        effect.element.undoPositioned().setStyle(oldStyle);
  }}); }}); }}); }}); }}); }});
};

Effect.SlideDown = function(element) {
  element = $(element).cleanWhitespace();
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, 100, Object.extend({
    scaleContent: false,
    scaleX: false,
    scaleFrom: window.opera ? 0 : 1,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().setStyle({height: '0px'}).show();
    },
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' });
    },
    afterFinishInternal: function(effect) {
      effect.element.undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
    }, arguments[1] || { })
  );
};

Effect.SlideUp = function(element) {
  element = $(element).cleanWhitespace();
  var oldInnerBottom = element.down().getStyle('bottom');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, window.opera ? 0 : 1,
   Object.extend({ scaleContent: false,
    scaleX: false,
    scaleMode: 'box',
    scaleFrom: 100,
    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
    restoreAfterFinish: true,
    afterSetup: function(effect) {
      effect.element.makePositioned();
      effect.element.down().makePositioned();
      if (window.opera) effect.element.setStyle({top: ''});
      effect.element.makeClipping().show();
    },
    afterUpdateInternal: function(effect) {
      effect.element.down().setStyle({bottom:
        (effect.dims[0] - effect.element.clientHeight) + 'px' });
    },
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping().undoPositioned();
      effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
    }
   }, arguments[1] || { })
  );
};

Effect.Squish = function(element) {
  return new Effect.Scale(element, window.opera ? 1 : 0, {
    restoreAfterFinish: true,
    beforeSetup: function(effect) {
      effect.element.makeClipping();
    },
    afterFinishInternal: function(effect) {
      effect.element.hide().undoClipping();
    }
  });
};

Effect.Grow = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.full
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();
  var initialMoveX, initialMoveY;
  var moveX, moveY;

  switch (options.direction) {
    case 'top-left':
      initialMoveX = initialMoveY = moveX = moveY = 0;
      break;
    case 'top-right':
      initialMoveX = dims.width;
      initialMoveY = moveY = 0;
      moveX = -dims.width;
      break;
    case 'bottom-left':
      initialMoveX = moveX = 0;
      initialMoveY = dims.height;
      moveY = -dims.height;
      break;
    case 'bottom-right':
      initialMoveX = dims.width;
      initialMoveY = dims.height;
      moveX = -dims.width;
      moveY = -dims.height;
      break;
    case 'center':
      initialMoveX = dims.width / 2;
      initialMoveY = dims.height / 2;
      moveX = -dims.width / 2;
      moveY = -dims.height / 2;
      break;
  }

  return new Effect.Move(element, {
    x: initialMoveX,
    y: initialMoveY,
    duration: 0.01,
    beforeSetup: function(effect) {
      effect.element.hide().makeClipping().makePositioned();
    },
    afterFinishInternal: function(effect) {
      new Effect.Parallel(
        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
          new Effect.Scale(effect.element, 100, {
            scaleMode: { originalHeight: dims.height, originalWidth: dims.width },
            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
        ], Object.extend({
             beforeSetup: function(effect) {
               effect.effects[0].element.setStyle({height: '0px'}).show();
             },
             afterFinishInternal: function(effect) {
               effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle);
             }
           }, options)
      );
    }
  });
};

Effect.Shrink = function(element) {
  element = $(element);
  var options = Object.extend({
    direction: 'center',
    moveTransition: Effect.Transitions.sinoidal,
    scaleTransition: Effect.Transitions.sinoidal,
    opacityTransition: Effect.Transitions.none
  }, arguments[1] || { });
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    height: element.style.height,
    width: element.style.width,
    opacity: element.getInlineOpacity() };

  var dims = element.getDimensions();
  var moveX, moveY;

  switch (options.direction) {
    case 'top-left':
      moveX = moveY = 0;
      break;
    case 'top-right':
      moveX = dims.width;
      moveY = 0;
      break;
    case 'bottom-left':
      moveX = 0;
      moveY = dims.height;
      break;
    case 'bottom-right':
      moveX = dims.width;
      moveY = dims.height;
      break;
    case 'center':
      moveX = dims.width / 2;
      moveY = dims.height / 2;
      break;
  }

  return new Effect.Parallel(
    [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
      new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
      new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
    ], Object.extend({
         beforeStartInternal: function(effect) {
           effect.effects[0].element.makePositioned().makeClipping();
         },
         afterFinishInternal: function(effect) {
           effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
       }, options)
  );
};

Effect.Pulsate = function(element) {
  element = $(element);
  var options    = arguments[1] || { },
    oldOpacity = element.getInlineOpacity(),
    transition = options.transition || Effect.Transitions.linear,
    reverser   = function(pos){
      return 1 - transition((-Math.cos((pos*(options.pulses||5)*2)*Math.PI)/2) + .5);
    };

  return new Effect.Opacity(element,
    Object.extend(Object.extend({  duration: 2.0, from: 0,
      afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
    }, options), {transition: reverser}));
};

Effect.Fold = function(element) {
  element = $(element);
  var oldStyle = {
    top: element.style.top,
    left: element.style.left,
    width: element.style.width,
    height: element.style.height };
  element.makeClipping();
  return new Effect.Scale(element, 5, Object.extend({
    scaleContent: false,
    scaleX: false,
    afterFinishInternal: function(effect) {
    new Effect.Scale(element, 1, {
      scaleContent: false,
      scaleY: false,
      afterFinishInternal: function(effect) {
        effect.element.hide().undoClipping().setStyle(oldStyle);
      } });
  }}, arguments[1] || { }));
};

Effect.Morph = Class.create(Effect.Base, {
  initialize: function(element) {
    this.element = $(element);
    if (!this.element) throw(Effect._elementDoesNotExistError);
    var options = Object.extend({
      style: { }
    }, arguments[1] || { });

    if (!Object.isString(options.style)) this.style = $H(options.style);
    else {
      if (options.style.include(':'))
        this.style = options.style.parseStyle();
      else {
        this.element.addClassName(options.style);
        this.style = $H(this.element.getStyles());
        this.element.removeClassName(options.style);
        var css = this.element.getStyles();
        this.style = this.style.reject(function(style) {
          return style.value == css[style.key];
        });
        options.afterFinishInternal = function(effect) {
          effect.element.addClassName(effect.options.style);
          effect.transforms.each(function(transform) {
            effect.element.style[transform.style] = '';
          });
        };
      }
    }
    this.start(options);
  },

  setup: function(){
    function parseColor(color){
      if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
      color = color.parseColor();
      return $R(0,2).map(function(i){
        return parseInt( color.slice(i*2+1,i*2+3), 16 );
      });
    }
    this.transforms = this.style.map(function(pair){
      var property = pair[0], value = pair[1], unit = null;

      if (value.parseColor('#zzzzzz') != '#zzzzzz') {
        value = value.parseColor();
        unit  = 'color';
      } else if (property == 'opacity') {
        value = parseFloat(value);
        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
          this.element.setStyle({zoom: 1});
      } else if (Element.CSS_LENGTH.test(value)) {
          var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
          value = parseFloat(components[1]);
          unit = (components.length == 3) ? components[2] : null;
      }

      var originalValue = this.element.getStyle(property);
      return {
        style: property.camelize(),
        originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0),
        targetValue: unit=='color' ? parseColor(value) : value,
        unit: unit
      };
    }.bind(this)).reject(function(transform){
      return (
        (transform.originalValue == transform.targetValue) ||
        (
          transform.unit != 'color' &&
          (isNaN(transform.originalValue) || isNaN(transform.targetValue))
        )
      );
    });
  },
  update: function(position) {
    var style = { }, transform, i = this.transforms.length;
    while(i--)
      style[(transform = this.transforms[i]).style] =
        transform.unit=='color' ? '#'+
          (Math.round(transform.originalValue[0]+
            (transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
          (Math.round(transform.originalValue[1]+
            (transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
          (Math.round(transform.originalValue[2]+
            (transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
        (transform.originalValue +
          (transform.targetValue - transform.originalValue) * position).toFixed(3) +
            (transform.unit === null ? '' : transform.unit);
    this.element.setStyle(style, true);
  }
});

Effect.Transform = Class.create({
  initialize: function(tracks){
    this.tracks  = [];
    this.options = arguments[1] || { };
    this.addTracks(tracks);
  },
  addTracks: function(tracks){
    tracks.each(function(track){
      track = $H(track);
      var data = track.values().first();
      this.tracks.push($H({
        ids:     track.keys().first(),
        effect:  Effect.Morph,
        options: { style: data }
      }));
    }.bind(this));
    return this;
  },
  play: function(){
    return new Effect.Parallel(
      this.tracks.map(function(track){
        var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
        var elements = [$(ids) || $$(ids)].flatten();
        return elements.map(function(e){ return new effect(e, Object.extend({ sync:true }, options)) });
      }).flatten(),
      this.options
    );
  }
});

Element.CSS_PROPERTIES = $w(
  'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' +
  'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
  'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
  'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
  'fontSize fontWeight height left letterSpacing lineHeight ' +
  'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
  'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
  'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
  'right textIndent top width wordSpacing zIndex');

Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function(){
  var style, styleRules = $H();
  if (Prototype.Browser.WebKit)
    style = new Element('div',{style:this}).style;
  else {
    String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
    style = String.__parseStyleElement.childNodes[0].style;
  }

  Element.CSS_PROPERTIES.each(function(property){
    if (style[property]) styleRules.set(property, style[property]);
  });

  if (Prototype.Browser.IE && this.include('opacity'))
    styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);

  return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle) {
  Element.getStyles = function(element) {
    var css = document.defaultView.getComputedStyle($(element), null);
    return Element.CSS_PROPERTIES.inject({ }, function(styles, property) {
      styles[property] = css[property];
      return styles;
    });
  };
} else {
  Element.getStyles = function(element) {
    element = $(element);
    var css = element.currentStyle, styles;
    styles = Element.CSS_PROPERTIES.inject({ }, function(results, property) {
      results[property] = css[property];
      return results;
    });
    if (!styles.opacity) styles.opacity = element.getOpacity();
    return styles;
  };
}

Effect.Methods = {
  morph: function(element, style) {
    element = $(element);
    new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
    return element;
  },
  visualEffect: function(element, effect, options) {
    element = $(element);
    var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
    new Effect[klass](element, options);
    return element;
  },
  highlight: function(element, options) {
    element = $(element);
    new Effect.Highlight(element, options);
    return element;
  }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown '+
  'pulsate shake puff squish switchOff dropOut').each(
  function(effect) {
    Effect.Methods[effect] = function(element, options){
      element = $(element);
      Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
      return element;
    };
  }
);

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each(
  function(f) { Effect.Methods[f] = Element[f]; }
);

Element.addMethods(Effect.Methods);

if(Object.isUndefined(Effect))
  throw("dragdrop.js requires including script.aculo.us' effects.js library");

var Droppables = {
  drops: [],

  remove: function(element) {
    this.drops = this.drops.reject(function(d) { return d.element==$(element) });
  },

  add: function(element) {
    element = $(element);
    var options = Object.extend({
      greedy:     true,
      hoverclass: null,
      tree:       false
    }, arguments[1] || { });

    if(options.containment) {
      options._containers = [];
      var containment = options.containment;
      if(Object.isArray(containment)) {
        containment.each( function(c) { options._containers.push($(c)) });
      } else {
        options._containers.push($(containment));
      }
    }

    if(options.accept) options.accept = [options.accept].flatten();

    Element.makePositioned(element); // fix IE
    options.element = element;

    this.drops.push(options);
  },

  findDeepestChild: function(drops) {
    deepest = drops[0];

    for (i = 1; i < drops.length; ++i)
      if (Element.isParent(drops[i].element, deepest.element))
        deepest = drops[i];

    return deepest;
  },

  isContained: function(element, drop) {
    var containmentNode;
    if(drop.tree) {
      containmentNode = element.treeNode;
    } else {
      containmentNode = element.parentNode;
    }
    return drop._containers.detect(function(c) { return containmentNode == c });
  },

  isAffected: function(point, element, drop) {
    return (
      (drop.element!=element) &&
      ((!drop._containers) ||
        this.isContained(element, drop)) &&
      ((!drop.accept) ||
        (Element.classNames(element).detect(
          function(v) { return drop.accept.include(v) } ) )) &&
      Position.within(drop.element, point[0], point[1]) );
  },

  deactivate: function(drop) {
    if(drop.hoverclass)
      Element.removeClassName(drop.element, drop.hoverclass);
    this.last_active = null;
  },

  activate: function(drop) {
    if(drop.hoverclass)
      Element.addClassName(drop.element, drop.hoverclass);
    this.last_active = drop;
  },

  show: function(point, element) {
    if(!this.drops.length) return;
    var drop, affected = [];

    this.drops.each( function(drop) {
      if(Droppables.isAffected(point, element, drop))
        affected.push(drop);
    });

    if(affected.length>0)
      drop = Droppables.findDeepestChild(affected);

    if(this.last_active && this.last_active != drop) this.deactivate(this.last_active);
    if (drop) {
      Position.within(drop.element, point[0], point[1]);
      if(drop.onHover)
        drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));

      if (drop != this.last_active) Droppables.activate(drop);
    }
  },

  fire: function(event, element) {
    if(!this.last_active) return;
    Position.prepare();

    if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active))
      if (this.last_active.onDrop) {
        this.last_active.onDrop(element, this.last_active.element, event);
        return true;
      }
  },

  reset: function() {
    if(this.last_active)
      this.deactivate(this.last_active);
  }
};

var Draggables = {
  drags: [],
  observers: [],

  register: function(draggable) {
    if(this.drags.length == 0) {
      this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
      this.eventMouseMove = this.updateDrag.bindAsEventListener(this);
      this.eventKeypress  = this.keyPress.bindAsEventListener(this);

      Event.observe(document, "mouseup", this.eventMouseUp);
      Event.observe(document, "mousemove", this.eventMouseMove);
      Event.observe(document, "keypress", this.eventKeypress);
    }
    this.drags.push(draggable);
  },

  unregister: function(draggable) {
    this.drags = this.drags.reject(function(d) { return d==draggable });
    if(this.drags.length == 0) {
      Event.stopObserving(document, "mouseup", this.eventMouseUp);
      Event.stopObserving(document, "mousemove", this.eventMouseMove);
      Event.stopObserving(document, "keypress", this.eventKeypress);
    }
  },

  activate: function(draggable) {
    if(draggable.options.delay) {
      this._timeout = setTimeout(function() {
        Draggables._timeout = null;
        window.focus();
        Draggables.activeDraggable = draggable;
      }.bind(this), draggable.options.delay);
    } else {
      window.focus(); // allows keypress events if window isn't currently focused, fails for Safari
      this.activeDraggable = draggable;
    }
  },

  deactivate: function() {
    this.activeDraggable = null;
  },

  updateDrag: function(event) {
    if(!this.activeDraggable) return;
    var pointer = [Event.pointerX(event), Event.pointerY(event)];
    if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return;
    this._lastPointer = pointer;

    this.activeDraggable.updateDrag(event, pointer);
  },

  endDrag: function(event) {
    if(this._timeout) {
      clearTimeout(this._timeout);
      this._timeout = null;
    }
    if(!this.activeDraggable) return;
    this._lastPointer = null;
    this.activeDraggable.endDrag(event);
    this.activeDraggable = null;
  },

  keyPress: function(event) {
    if(this.activeDraggable)
      this.activeDraggable.keyPress(event);
  },

  addObserver: function(observer) {
    this.observers.push(observer);
    this._cacheObserverCallbacks();
  },

  removeObserver: function(element) {  // element instead of observer fixes mem leaks
    this.observers = this.observers.reject( function(o) { return o.element==element });
    this._cacheObserverCallbacks();
  },

  notify: function(eventName, draggable, event) {  // 'onStart', 'onEnd', 'onDrag'
    if(this[eventName+'Count'] > 0)
      this.observers.each( function(o) {
        if(o[eventName]) o[eventName](eventName, draggable, event);
      });
    if(draggable.options[eventName]) draggable.options[eventName](draggable, event);
  },

  _cacheObserverCallbacks: function() {
    ['onStart','onEnd','onDrag'].each( function(eventName) {
      Draggables[eventName+'Count'] = Draggables.observers.select(
        function(o) { return o[eventName]; }
      ).length;
    });
  }
};

/*--------------------------------------------------------------------------*/

var Draggable = Class.create({
  initialize: function(element) {
    var defaults = {
      handle: false,
      reverteffect: function(element, top_offset, left_offset) {
        var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
        new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur,
          queue: {scope:'_draggable', position:'end'}
        });
      },
      endeffect: function(element) {
        var toOpacity = Object.isNumber(element._opacity) ? element._opacity : 1.0;
        new Effect.Opacity(element, {duration:0.2, from:0.7, to:toOpacity,
          queue: {scope:'_draggable', position:'end'},
          afterFinish: function(){
            Draggable._dragging[element] = false
          }
        });
      },
      zindex: 1000,
      revert: false,
      quiet: false,
      scroll: false,
      scrollSensitivity: 20,
      scrollSpeed: 15,
      snap: false,  // false, or xy or [x,y] or function(x,y){ return [x,y] }
      delay: 0
    };

    if(!arguments[1] || Object.isUndefined(arguments[1].endeffect))
      Object.extend(defaults, {
        starteffect: function(element) {
          element._opacity = Element.getOpacity(element);
          Draggable._dragging[element] = true;
          new Effect.Opacity(element, {duration:0.2, from:element._opacity, to:0.7});
        }
      });

    var options = Object.extend(defaults, arguments[1] || { });

    this.element = $(element);

    if(options.handle && Object.isString(options.handle))
      this.handle = this.element.down('.'+options.handle, 0);

    if(!this.handle) this.handle = $(options.handle);
    if(!this.handle) this.handle = this.element;

    if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML) {
      options.scroll = $(options.scroll);
      this._isScrollChild = Element.childOf(this.element, options.scroll);
    }

    Element.makePositioned(this.element); // fix IE

    this.options  = options;
    this.dragging = false;

    this.eventMouseDown = this.initDrag.bindAsEventListener(this);
    Event.observe(this.handle, "mousedown", this.eventMouseDown);

    Draggables.register(this);
  },

  destroy: function() {
    Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
    Draggables.unregister(this);
  },

  currentDelta: function() {
    return([
      parseInt(Element.getStyle(this.element,'left') || '0'),
      parseInt(Element.getStyle(this.element,'top') || '0')]);
  },

  initDrag: function(event) {
    if(!Object.isUndefined(Draggable._dragging[this.element]) &&
      Draggable._dragging[this.element]) return;
    if(Event.isLeftClick(event)) {
      var src = Event.element(event);
      if((tag_name = src.tagName.toUpperCase()) && (
        tag_name=='INPUT' ||
        tag_name=='SELECT' ||
        tag_name=='OPTION' ||
        tag_name=='BUTTON' ||
        tag_name=='TEXTAREA')) return;

      var pointer = [Event.pointerX(event), Event.pointerY(event)];
      var pos     = Position.cumulativeOffset(this.element);
      this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });

      Draggables.activate(this);
      Event.stop(event);
    }
  },

  startDrag: function(event) {
    this.dragging = true;
    if(!this.delta)
      this.delta = this.currentDelta();

    if(this.options.zindex) {
      this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0);
      this.element.style.zIndex = this.options.zindex;
    }

    if(this.options.ghosting) {
      this._clone = this.element.cloneNode(true);
      this._originallyAbsolute = (this.element.getStyle('position') == 'absolute');
      if (!this._originallyAbsolute)
        Position.absolutize(this.element);
      this.element.parentNode.insertBefore(this._clone, this.element);
    }

    if(this.options.scroll) {
      if (this.options.scroll == window) {
        var where = this._getWindowScroll(this.options.scroll);
        this.originalScrollLeft = where.left;
        this.originalScrollTop = where.top;
      } else {
        this.originalScrollLeft = this.options.scroll.scrollLeft;
        this.originalScrollTop = this.options.scroll.scrollTop;
      }
    }

    Draggables.notify('onStart', this, event);

    if(this.options.starteffect) this.options.starteffect(this.element);
  },

  updateDrag: function(event, pointer) {
    if(!this.dragging) this.startDrag(event);

    if(!this.options.quiet){
      Position.prepare();
      Droppables.show(pointer, this.element);
    }

    Draggables.notify('onDrag', this, event);

    this.draw(pointer);
    if(this.options.change) this.options.change(this);

    if(this.options.scroll) {
      this.stopScrolling();

      var p;
      if (this.options.scroll == window) {
        with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; }
      } else {
        p = Position.page(this.options.scroll);
        p[0] += this.options.scroll.scrollLeft + Position.deltaX;
        p[1] += this.options.scroll.scrollTop + Position.deltaY;
        p.push(p[0]+this.options.scroll.offsetWidth);
        p.push(p[1]+this.options.scroll.offsetHeight);
      }
      var speed = [0,0];
      if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity);
      if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity);
      if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity);
      if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity);
      this.startScrolling(speed);
    }

    if(Prototype.Browser.WebKit) window.scrollBy(0,0);

    Event.stop(event);
  },

  finishDrag: function(event, success) {
    this.dragging = false;

    if(this.options.quiet){
      Position.prepare();
      var pointer = [Event.pointerX(event), Event.pointerY(event)];
      Droppables.show(pointer, this.element);
    }

    if(this.options.ghosting) {
      if (!this._originallyAbsolute)
        Position.relativize(this.element);
      delete this._originallyAbsolute;
      Element.remove(this._clone);
      this._clone = null;
    }

    var dropped = false;
    if(success) {
      dropped = Droppables.fire(event, this.element);
      if (!dropped) dropped = false;
    }
    if(dropped && this.options.onDropped) this.options.onDropped(this.element);
    Draggables.notify('onEnd', this, event);

    var revert = this.options.revert;
    if(revert && Object.isFunction(revert)) revert = revert(this.element);

    var d = this.currentDelta();
    if(revert && this.options.reverteffect) {
      if (dropped == 0 || revert != 'failure')
        this.options.reverteffect(this.element,
          d[1]-this.delta[1], d[0]-this.delta[0]);
    } else {
      this.delta = d;
    }

    if(this.options.zindex)
      this.element.style.zIndex = this.originalZ;

    if(this.options.endeffect)
      this.options.endeffect(this.element);

    Draggables.deactivate(this);
    Droppables.reset();
  },

  keyPress: function(event) {
    if(event.keyCode!=Event.KEY_ESC) return;
    this.finishDrag(event, false);
    Event.stop(event);
  },

  endDrag: function(event) {
    if(!this.dragging) return;
    this.stopScrolling();
    this.finishDrag(event, true);
    Event.stop(event);
  },

  draw: function(point) {
    var pos = Position.cumulativeOffset(this.element);
    if(this.options.ghosting) {
      var r   = Position.realOffset(this.element);
      pos[0] += r[0] - Position.deltaX; pos[1] += r[1] - Position.deltaY;
    }

    var d = this.currentDelta();
    pos[0] -= d[0]; pos[1] -= d[1];

    if(this.options.scroll && (this.options.scroll != window && this._isScrollChild)) {
      pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft;
      pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop;
    }

    var p = [0,1].map(function(i){
      return (point[i]-pos[i]-this.offset[i])
    }.bind(this));

    if(this.options.snap) {
      if(Object.isFunction(this.options.snap)) {
        p = this.options.snap(p[0],p[1],this);
      } else {
      if(Object.isArray(this.options.snap)) {
        p = p.map( function(v, i) {
          return (v/this.options.snap[i]).round()*this.options.snap[i] }.bind(this));
      } else {
        p = p.map( function(v) {
          return (v/this.options.snap).round()*this.options.snap }.bind(this));
      }
    }}

    var style = this.element.style;
    if((!this.options.constraint) || (this.options.constraint=='horizontal'))
      style.left = p[0] + "px";
    if((!this.options.constraint) || (this.options.constraint=='vertical'))
      style.top  = p[1] + "px";

    if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering
  },

  stopScrolling: function() {
    if(this.scrollInterval) {
      clearInterval(this.scrollInterval);
      this.scrollInterval = null;
      Draggables._lastScrollPointer = null;
    }
  },

  startScrolling: function(speed) {
    if(!(speed[0] || speed[1])) return;
    this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];
    this.lastScrolled = new Date();
    this.scrollInterval = setInterval(this.scroll.bind(this), 10);
  },

  scroll: function() {
    var current = new Date();
    var delta = current - this.lastScrolled;
    this.lastScrolled = current;
    if(this.options.scroll == window) {
      with (this._getWindowScroll(this.options.scroll)) {
        if (this.scrollSpeed[0] || this.scrollSpeed[1]) {
          var d = delta / 1000;
          this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] );
        }
      }
    } else {
      this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000;
      this.options.scroll.scrollTop  += this.scrollSpeed[1] * delta / 1000;
    }

    Position.prepare();
    Droppables.show(Draggables._lastPointer, this.element);
    Draggables.notify('onDrag', this);
    if (this._isScrollChild) {
      Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer);
      Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000;
      Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000;
      if (Draggables._lastScrollPointer[0] < 0)
        Draggables._lastScrollPointer[0] = 0;
      if (Draggables._lastScrollPointer[1] < 0)
        Draggables._lastScrollPointer[1] = 0;
      this.draw(Draggables._lastScrollPointer);
    }

    if(this.options.change) this.options.change(this);
  },

  _getWindowScroll: function(w) {
    var T, L, W, H;
    with (w.document) {
      if (w.document.documentElement && documentElement.scrollTop) {
        T = documentElement.scrollTop;
        L = documentElement.scrollLeft;
      } else if (w.document.body) {
        T = body.scrollTop;
        L = body.scrollLeft;
      }
      if (w.innerWidth) {
        W = w.innerWidth;
        H = w.innerHeight;
      } else if (w.document.documentElement && documentElement.clientWidth) {
        W = documentElement.clientWidth;
        H = documentElement.clientHeight;
      } else {
        W = body.offsetWidth;
        H = body.offsetHeight;
      }
    }
    return { top: T, left: L, width: W, height: H };
  }
});

Draggable._dragging = { };

/*--------------------------------------------------------------------------*/

var SortableObserver = Class.create({
  initialize: function(element, observer) {
    this.element   = $(element);
    this.observer  = observer;
    this.lastValue = Sortable.serialize(this.element);
  },

  onStart: function() {
    this.lastValue = Sortable.serialize(this.element);
  },

  onEnd: function() {
    Sortable.unmark();
    if(this.lastValue != Sortable.serialize(this.element))
      this.observer(this.element)
  }
});

var Sortable = {
  SERIALIZE_RULE: /^[^_\-](?:[A-Za-z0-9\-\_]*)[_](.*)$/,

  sortables: { },

  _findRootElement: function(element) {
    while (element.tagName.toUpperCase() != "BODY") {
      if(element.id && Sortable.sortables[element.id]) return element;
      element = element.parentNode;
    }
  },

  options: function(element) {
    element = Sortable._findRootElement($(element));
    if(!element) return;
    return Sortable.sortables[element.id];
  },

  destroy: function(element){
    element = $(element);
    var s = Sortable.sortables[element.id];

    if(s) {
      Draggables.removeObserver(s.element);
      s.droppables.each(function(d){ Droppables.remove(d) });
      s.draggables.invoke('destroy');

      delete Sortable.sortables[s.element.id];
    }
  },

  create: function(element) {
    element = $(element);
    var options = Object.extend({
      element:     element,
      tag:         'li',       // assumes li children, override with tag: 'tagname'
      dropOnEmpty: false,
      tree:        false,
      treeTag:     'ul',
      overlap:     'vertical', // one of 'vertical', 'horizontal'
      constraint:  'vertical', // one of 'vertical', 'horizontal', false
      containment: element,    // also takes array of elements (or id's); or false
      handle:      false,      // or a CSS class
      only:        false,
      delay:       0,
      hoverclass:  null,
      ghosting:    false,
      quiet:       false,
      scroll:      false,
      scrollSensitivity: 20,
      scrollSpeed: 15,
      format:      this.SERIALIZE_RULE,

      elements:    false,
      handles:     false,

      onChange:    Prototype.emptyFunction,
      onUpdate:    Prototype.emptyFunction
    }, arguments[1] || { });

    this.destroy(element);

    var options_for_draggable = {
      revert:      true,
      quiet:       options.quiet,
      scroll:      options.scroll,
      scrollSpeed: options.scrollSpeed,
      scrollSensitivity: options.scrollSensitivity,
      delay:       options.delay,
      ghosting:    options.ghosting,
      constraint:  options.constraint,
      handle:      options.handle };

    if(options.starteffect)
      options_for_draggable.starteffect = options.starteffect;

    if(options.reverteffect)
      options_for_draggable.reverteffect = options.reverteffect;
    else
      if(options.ghosting) options_for_draggable.reverteffect = function(element) {
        element.style.top  = 0;
        element.style.left = 0;
      };

    if(options.endeffect)
      options_for_draggable.endeffect = options.endeffect;

    if(options.zindex)
      options_for_draggable.zindex = options.zindex;

    var options_for_droppable = {
      overlap:     options.overlap,
      containment: options.containment,
      tree:        options.tree,
      hoverclass:  options.hoverclass,
      onHover:     Sortable.onHover
    };

    var options_for_tree = {
      onHover:      Sortable.onEmptyHover,
      overlap:      options.overlap,
      containment:  options.containment,
      hoverclass:   options.hoverclass
    };

    Element.cleanWhitespace(element);

    options.draggables = [];
    options.droppables = [];

    if(options.dropOnEmpty || options.tree) {
      Droppables.add(element, options_for_tree);
      options.droppables.push(element);
    }

    (options.elements || this.findElements(element, options) || []).each( function(e,i) {
      var handle = options.handles ? $(options.handles[i]) :
        (options.handle ? $(e).select('.' + options.handle)[0] : e);
      options.draggables.push(
        new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));
      Droppables.add(e, options_for_droppable);
      if(options.tree) e.treeNode = element;
      options.droppables.push(e);
    });

    if(options.tree) {
      (Sortable.findTreeElements(element, options) || []).each( function(e) {
        Droppables.add(e, options_for_tree);
        e.treeNode = element;
        options.droppables.push(e);
      });
    }

    this.sortables[element.id] = options;

    Draggables.addObserver(new SortableObserver(element, options.onUpdate));

  },

  findElements: function(element, options) {
    return Element.findChildren(
      element, options.only, options.tree ? true : false, options.tag);
  },

  findTreeElements: function(element, options) {
    return Element.findChildren(
      element, options.only, options.tree ? true : false, options.treeTag);
  },

  onHover: function(element, dropon, overlap) {
    if(Element.isParent(dropon, element)) return;

    if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) {
      return;
    } else if(overlap>0.5) {
      Sortable.mark(dropon, 'before');
      if(dropon.previousSibling != element) {
        var oldParentNode = element.parentNode;
        element.style.visibility = "hidden"; // fix gecko rendering
        dropon.parentNode.insertBefore(element, dropon);
        if(dropon.parentNode!=oldParentNode)
          Sortable.options(oldParentNode).onChange(element);
        Sortable.options(dropon.parentNode).onChange(element);
      }
    } else {
      Sortable.mark(dropon, 'after');
      var nextElement = dropon.nextSibling || null;
      if(nextElement != element) {
        var oldParentNode = element.parentNode;
        element.style.visibility = "hidden"; // fix gecko rendering
        dropon.parentNode.insertBefore(element, nextElement);
        if(dropon.parentNode!=oldParentNode)
          Sortable.options(oldParentNode).onChange(element);
        Sortable.options(dropon.parentNode).onChange(element);
      }
    }
  },

  onEmptyHover: function(element, dropon, overlap) {
    var oldParentNode = element.parentNode;
    var droponOptions = Sortable.options(dropon);

    if(!Element.isParent(dropon, element)) {
      var index;

      var children = Sortable.findElements(dropon, {tag: droponOptions.tag, only: droponOptions.only});
      var child = null;

      if(children) {
        var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap);

        for (index = 0; index < children.length; index += 1) {
          if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) {
            offset -= Element.offsetSize (children[index], droponOptions.overlap);
          } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) {
            child = index + 1 < children.length ? children[index + 1] : null;
            break;
          } else {
            child = children[index];
            break;
          }
        }
      }

      dropon.insertBefore(element, child);

      Sortable.options(oldParentNode).onChange(element);
      droponOptions.onChange(element);
    }
  },

  unmark: function() {
    if(Sortable._marker) Sortable._marker.hide();
  },

  mark: function(dropon, position) {
    var sortable = Sortable.options(dropon.parentNode);
    if(sortable && !sortable.ghosting) return;

    if(!Sortable._marker) {
      Sortable._marker =
        ($('dropmarker') || Element.extend(document.createElement('DIV'))).
          hide().addClassName('dropmarker').setStyle({position:'absolute'});
      document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
    }
    var offsets = Position.cumulativeOffset(dropon);
    Sortable._marker.setStyle({left: offsets[0]+'px', top: offsets[1] + 'px'});

    if(position=='after')
      if(sortable.overlap == 'horizontal')
        Sortable._marker.setStyle({left: (offsets[0]+dropon.clientWidth) + 'px'});
      else
        Sortable._marker.setStyle({top: (offsets[1]+dropon.clientHeight) + 'px'});

    Sortable._marker.show();
  },

  _tree: function(element, options, parent) {
    var children = Sortable.findElements(element, options) || [];

    for (var i = 0; i < children.length; ++i) {
      var match = children[i].id.match(options.format);

      if (!match) continue;

      var child = {
        id: encodeURIComponent(match ? match[1] : null),
        element: element,
        parent: parent,
        children: [],
        position: parent.children.length,
        container: $(children[i]).down(options.treeTag)
      };

      /* Get the element containing the children and recurse over it */
      if (child.container)
        this._tree(child.container, options, child);

      parent.children.push (child);
    }

    return parent;
  },

  tree: function(element) {
    element = $(element);
    var sortableOptions = this.options(element);
    var options = Object.extend({
      tag: sortableOptions.tag,
      treeTag: sortableOptions.treeTag,
      only: sortableOptions.only,
      name: element.id,
      format: sortableOptions.format
    }, arguments[1] || { });

    var root = {
      id: null,
      parent: null,
      children: [],
      container: element,
      position: 0
    };

    return Sortable._tree(element, options, root);
  },

  /* Construct a [i] index for a particular node */
  _constructIndex: function(node) {
    var index = '';
    do {
      if (node.id) index = '[' + node.position + ']' + index;
    } while ((node = node.parent) != null);
    return index;
  },

  sequence: function(element) {
    element = $(element);
    var options = Object.extend(this.options(element), arguments[1] || { });

    return $(this.findElements(element, options) || []).map( function(item) {
      return item.id.match(options.format) ? item.id.match(options.format)[1] : '';
    });
  },

  setSequence: function(element, new_sequence) {
    element = $(element);
    var options = Object.extend(this.options(element), arguments[2] || { });

    var nodeMap = { };
    this.findElements(element, options).each( function(n) {
        if (n.id.match(options.format))
            nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];
        n.parentNode.removeChild(n);
    });

    new_sequence.each(function(ident) {
      var n = nodeMap[ident];
      if (n) {
        n[1].appendChild(n[0]);
        delete nodeMap[ident];
      }
    });
  },

  serialize: function(element) {
    element = $(element);
    var options = Object.extend(Sortable.options(element), arguments[1] || { });
    var name = encodeURIComponent(
      (arguments[1] && arguments[1].name) ? arguments[1].name : element.id);

    if (options.tree) {
      return Sortable.tree(element, arguments[1]).children.map( function (item) {
        return [name + Sortable._constructIndex(item) + "[id]=" +
                encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));
      }).flatten().join('&');
    } else {
      return Sortable.sequence(element, arguments[1]).map( function(item) {
        return name + "[]=" + encodeURIComponent(item);
      }).join('&');
    }
  }
};

Element.isParent = function(child, element) {
  if (!child.parentNode || child == element) return false;
  if (child.parentNode == element) return true;
  return Element.isParent(child.parentNode, element);
};

Element.findChildren = function(element, only, recursive, tagName) {
  if(!element.hasChildNodes()) return null;
  tagName = tagName.toUpperCase();
  if(only) only = [only].flatten();
  var elements = [];
  $A(element.childNodes).each( function(e) {
    if(e.tagName && e.tagName.toUpperCase()==tagName &&
      (!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))
        elements.push(e);
    if(recursive) {
      var grandchildren = Element.findChildren(e, only, recursive, tagName);
      if(grandchildren) elements.push(grandchildren);
    }
  });

  return (elements.length>0 ? elements.flatten() : []);
};

Element.offsetSize = function (element, type) {
  return element['offset' + ((type=='vertical' || type=='height') ? 'Height' : 'Width')];
};

Element.addMethods({
  upwards: function(element, iterator) {
    while (element = $(element)) {
      if (iterator(element)) return element;
      element = element.parentNode;
    }
  }
});

var HoverObserver = Class.create();

Object.extend(HoverObserver, {
  Options: {
    activationDelay:    0,
    deactivationDelay:  0.5,
    targetClassName:    "hover_target",
    containerClassName: "hover_container",
    containerAttribute: "hover_container",
    activeClassName:    "hover",
    activationEvent:    "hover:activated",
    deactivationEvent:  "hover:deactivated",
    clickToHover:       false
  }
});

Object.extend(HoverObserver.prototype, {
  initialize: function(element, options) {
    this.element = $(element);
    this.options = Object.extend(Object.clone(HoverObserver.Options), options || {});
    this.start();
  },

  start: function() {
    if (!this.observers) {
      var events = $w(this.options.clickToHover ? "click" : "mouseover mouseout");
      this.observers = events.map(function(name) {
        var handler = this["on" + name.capitalize()].bind(this);
        this.element.observe(name, handler);
        return { name: name, handler: handler };
      }.bind(this));
    }
  },

  stop: function() {
    if (this.observers) {
      this.observers.each(function(info) {
        this.element.stopObserving(info.name, info.handler);
      }.bind(this));
      delete this.observers;
    }
  },

  onClick: function(event) {
    var element   = this.activeHoverElement = event.element();
    var container = this.getContainerForElement(element);

    if (container) {
      if (this.activeContainer && container == this.activeContainer)
        return this.deactivateContainer();
      this.activateContainer(container);
    }
  },

  onMouseover: function(event) {
    var element   = this.activeHoverElement = event.element();
    var container = this.getContainerForElement(element);

    if (container) {
      if (this.activeContainer) {
        this.activateContainer(container);
      } else {
        this.startDelayedActivation(container);
      }
    } else {
      this.startDelayedDeactivation();
    }
  },

  onMouseout: function(event) {
    delete this.activeHoverElement;
    this.startDelayedDeactivation();
  },

  activateContainer: function(container) {
    var memo = { toElement: container };
    this.stopDelayedDeactivation();

    if (this.activeContainer) {
      if (this.activeContainer == container) return;
      memo.fromElement = this.activeContainer;
      this.deactivateContainer(memo);
    }

    this.activeContainer = container;
    this.activeContainer.fire(this.options.activationEvent, memo);
    this.activeContainer.addClassName(this.options.activeClassName);
  },

  deactivateContainer: function(memo) {
    if (this.activeContainer) {
      try {
        this.activeContainer.removeClassName(this.options.activeClassName);
        this.activeContainer.fire(this.options.deactivationEvent, memo);
      } catch (e) {
      }

      delete this.activeContainer;
    }
  },

  startDelayedActivation: function(container) {
    if (this.options.activationDelay) {
      (function() {
        if (container == this.getContainerForElement(this.activeHoverElement))
          this.activateContainer(container);

      }).bind(this).delay(this.options.activationDelay);
    } else {
      this.activateContainer(container);
    }
  },

  startDelayedDeactivation: function() {
    if (this.options.deactivationDelay) {
      this.deactivationTimeout = this.deactivationTimeout || function() {
        var container = this.getContainerForElement(this.activeHoverElement);
        if (!container || container != this.activeContainer)
          this.deactivateContainer();

      }.bind(this).delay(this.options.deactivationDelay);
    } else {
      this.deactivateContainer();
    }
  },

  stopDelayedDeactivation: function() {
    if (this.deactivationTimeout) {
      window.clearTimeout(this.deactivationTimeout);
      delete this.deactivationTimeout;
    }
  },

  getContainerForElement: function(element) {
    if (!element) return;

    if (element.hasAttribute && !element.hasAttribute(this.options.containerAttribute)) {
      var target    = this.getTargetForElement(element);
      var container = this.getContainerForTarget(target);
      this.cacheContainerFromElementToTarget(container, element, target);
    }

    return $(element.readAttribute(this.options.containerAttribute));
  },

  getTargetForElement: function(element) {
    if (!element) return;
    var targetClassName = this.options.targetClassName;
    return element.upwards(function(e) {
      if (e.hasClassName)
        return e.hasClassName(targetClassName);
    });
  },

  getContainerForTarget: function(element) {
    if (!element) return;
    var containerClassName = this.options.containerClassName,
        containerAttribute = this.options.containerAttribute;

    var container = element.upwards(function(e) {
      if (e.hasAttribute && e.hasClassName)
        return e.hasAttribute(containerAttribute) || e.hasClassName(containerClassName);
    });

    if (container && container.hasAttribute(containerAttribute)) {
      return $(container.readAttribute(containerAttribute));
    } else {
      return container;
    }
  },

  cacheContainerFromElementToTarget: function(container, element, target) {
    if (container && target) {
      element.upwards(function(e) {
        e.writeAttribute(this.options.containerAttribute, container.identify());
        if (e == target) return true;
      }.bind(this));
    }
  }
});
Element.addMethods({
  autofocus: function(element) {
    element = $(element);
    var field;
    if (field = element.down(".autofocus")) {
      (function() { try { field.focus() } catch (e) { } }).defer();
    }
    return element;
  }
});
Element.addMethods({
  slideIntoView: function(element, options) {
    element = $(element), options = options || {};

    var effect;
    var top = element.cumulativeOffset()[1], height = element.getHeight(), bottom = top + height;
    var viewTop = document.viewport.getScrollOffsets().top, viewHeight = document.viewport.getHeight(),
        viewBottom = viewTop + viewHeight;

    if (top < viewTop) {
      effect = new Effect.ScrollTo(element, Object.extend({ duration: 0.15 }, options));
    } else if (bottom > viewBottom) {
      effect = new Effect.ScrollTo(element, Object.extend({ duration: 0.15, offset: height - viewHeight }, options));
    }

    if (options.sync) return effect;
    return element;
  }
});
Effect.Height = Class.create();
Object.extend(Effect.Height.prototype, Effect.Base.prototype);
Object.extend(Effect.Height.prototype, {
  initialize: function(element, options) {
    this.element = $(element);
    options = Object.extend({
      from: this.element.getHeight(),
      to: 0
    }, options || {});
    this.start(options);
  },

  setup: function() {
    this.setHeight(this.options.from);
  },

  update: function(position) {
    this.setHeight(position);
  },

  finish: function() {
    this.setHeight(this.options.to);
  },

  setHeight: function(height) {
    this.element.style.height = parseInt(height) + "px";
  }
});

Effect.Blend = Class.create();
Object.extend(Effect.Blend.prototype, Effect.Base.prototype);
Object.extend(Effect.Blend.prototype, {
  initialize: function(element, options) {
    this.element = $(element);
    options = Object.extend({
      invert: false,
      from: 0.0,
      to: 1.0
    }, options || {});
    this.start(options);
  },

  setup: function() {
    this.setOpacityByPosition(this.options.from);
  },

  update: function(position) {
    this.setOpacityByPosition(position);
  },

  finish: function() {
    this.setOpacityByPosition(this.options.to);
  },

  setOpacityByPosition: function(position) {
    var opacity = this.options.invert ? 1.0 - position : position;
    this.element.setOpacity(opacity);
  }
});

var Transitions = {
  animationEnabled: true
};

Element.addMethods({
  transition: function(element, change, options) {
    if (typeof change == "object" && typeof options == "function")
      change = [change, options], options = change.shift(), change = change.shift();

    element = $(element);
    options = options || {};
    options.animate = options.animate !== false && Transitions.animationEnabled;
    options.fade = options.fade !== false;

    function finish() {
      (options.after || Prototype.K)();
    }

    function highlightAndFinish(destinationElement) {
      if (options.highlight) {
        var highlightElement = options.highlight === true ? destinationElement : ($(options.highlight) || destinationElement);
        new Effect.Highlight(highlightElement, { duration: 2, afterFinish: finish });
      } else {
        finish.defer();
      }
    }

    function cloneWithoutIDs(element) {
      element = $(element);
      var clone = element.cloneNode(true);
      clone.id = "";
      clone.getElementsBySelector("*[id]").each(function(e) { e.id = "" });
      return clone;
    }

    if (options.animate) {
      var transitionElement = new Element("div").setStyle({ position: "relative", overflow: "hidden" });
      element.insert({ before: transitionElement });

      var sourceElement = cloneWithoutIDs(element);
      var sourceElementWrapper = sourceElement.wrap("div");
      var destinationElementWrapper = element.wrap("div");
      transitionElement.appendChild(sourceElementWrapper);
      transitionElement.appendChild(destinationElementWrapper);
    }

    change(element);

    if (options.animate) {
      var sourceHeight = sourceElementWrapper.getHeight(), destinationHeight = destinationElementWrapper.getHeight();
      var sourceWidth  = sourceElementWrapper.getWidth(),  destinationWidth  = destinationElementWrapper.getWidth();

      var outerWrapper = new Element("div");
      transitionElement.insert({ before: outerWrapper });
      outerWrapper.setStyle({ overflow: "hidden", height: sourceHeight + "px"});
      outerWrapper.appendChild(transitionElement);

      var maxHeight = destinationHeight > sourceHeight ? destinationHeight : sourceHeight;
      transitionElement.setStyle({ height: maxHeight + "px" });
      sourceElementWrapper.setStyle({ position: "absolute", height: maxHeight + "px", width: sourceWidth + "px", top: 0, left: 0 });
      destinationElementWrapper.setStyle({ position: "absolute", height: maxHeight + "px", width: sourceWidth + "px", top: 0, left: 0, opacity: 0, zIndex: 2000 });

      var effects = [
        new Effect.Height(transitionElement, { sync: true, from: sourceHeight, to: destinationHeight }),
        new Effect.Blend(destinationElementWrapper, { sync: true })
      ];

      if (options.fade) {
        effects.push(new Effect.Blend(sourceElementWrapper, { invert: true, sync: true }));
        destinationElementWrapper.setStyle({ zIndex: 0 });
        sourceElementWrapper.setStyle({ zIndex: 2000 });
      }

      new Effect.Parallel(effects, {
        duration: options.duration || 0.3,

        afterUpdate: function() {
          if (outerWrapper) {
            outerWrapper.insert({ before: transitionElement });
            outerWrapper.remove();
            outerWrapper = false;
          }
        },

        afterFinish: function() {
          var destinationElement = destinationElementWrapper.down();
          if (destinationElement)
            transitionElement.insert({ before: destinationElement });
          transitionElement.remove();

          highlightAndFinish(destinationElement);
        }
      });

    } else {
      highlightAndFinish(element);
    }

    return {
      after: function(after) {
        options.after = (options.after || Prototype.K).wrap(function(proceed) {
          proceed();
          after();
        });
        return this;
      }
    };
  }
});


if (Prototype.Browser.IE) {
  window._prompt = window.prompt;
  window.prompt = function(text, value) {
    var self = arguments.callee;

    if (self.useModalDialog) {
      text = (text || "").toString(), value = (value || "").toString();
      return window.showModalDialog("/ie7_prompt_fix.html",
        { title: document.title, text: text.escapeHTML(), value: value.escapeHTML() },
        "dialogHeight:150px;dialogWidth:400px;scroll:no;status:no"
      );

    } else {
      var time = new Date().getTime(), result = window._prompt(text, value);
      if (new Date().getTime() - time < 10) {
        self.useModalDialog = true;
        result = self(text, value);
      }
      return result;
    }
  };
}

var AnchorObserver = {
  enabled:  true,
  interval: 0.1
};

document.observe("dom:loaded", function() {
  var lastAnchor = "";

  function poll() {
    var anchor = (window.location.hash || "").slice(1);
    if (anchor != lastAnchor) {
      document.fire("anchor:changed", { to: anchor, from: lastAnchor });
      lastAnchor = anchor;
    }
  }

  if (AnchorObserver.enabled) {
    setInterval(poll, AnchorObserver.interval * 1000);
  }
});
(function() {
  var emptyAnchorHandler;
  function getEmptyAnchorHandler() {
    return emptyAnchorHandler = emptyAnchorHandler ||
      new Element("a").writeAttribute({
        name:       "/"
      }).setStyle({
        position:   "absolute",
        visibility: "hidden"
      });
  }

  document.observe("click", function(event) {
    var element = event.findElement("a[href=#/]");
    if (element) {
      var offsets = document.viewport.getScrollOffsets();
      $(document.body).insert(getEmptyAnchorHandler().setStyle({
        left: offsets.left + "px",
        top:  offsets.top + "px"
      }));
    }
  });
})();
Event.observe(window, "resize", function(event) {
  document.fire("viewport:resized");
});

var DimZum = {
  Version: "0.1"
};

DimZum.Controller = Class.create({
  initialize: function(options) {
    this.options = options || { };
    this.prefix  = options.prefix || "z";
    this.active  = false;

    document.observe("anchor:changed", this.onAnchorChanged.bind(this));
    document.observe("shade:clicked", this.onShadeClicked.bind(this));
    document.observe("viewport:resized", this.onViewportResized.bind(this));
    document.observe("keypress", this.onKeyPressed.bind(this));
  },

  getShade: function() {
    return this.shade = this.shade || new DimZum.Shade(this.options.shade);
  },

  getWindow: function() {
    return this.window = this.window || new DimZum.Window(this.options.window);
  },

  onAnchorChanged: function(event) {
    if (this.isActableAnchor(event.memo.to)) {
      var elements = this.getElementsFromAnchor(event.memo.to);
      this.showElement(elements.first());

    } else {
      this.hideActiveElement();
    }
  },

  onShadeClicked: function(event) {
    this.close();
  },

  onViewportResized: function(event) {
    if (this.active) {
      this.getShade().resizeElement();
      this.getWindow().repositionWindow();
    }
  },

  onKeyPressed: function(event) {
    if (this.active && event.keyCode == Event.KEY_ESC) {
      this.close();
      event.stop();
    }
  },

  isActableAnchor: function(anchor) {
    var components = (anchor || "").split("/");
    if (components[0] != this.prefix) return false;
    if (!$(components[1])) return false;
    return true;
  },

  getElementsFromAnchor: function(anchor) {
    return anchor.split("/").slice(1).map(function(id) { return $(id) });
  },

  showElement: function(element) {
    if (!this.active) this.getShade().show();
    this.getWindow().showWithContents(element);
    this.active = true;
  },

  hideActiveElement: function() {
    if (this.active) {
      this.getWindow().hide();
      this.getShade().hide();
      this.active = false;
    }
  },

  close: function() {
    window.location.hash = "#/";
    this.hideActiveElement();
  },

  clearPurgatory: function() {
    this.getWindow().clearPurgatory();
  }
});
DimZum.Shade = Class.create({
  initialize: function(options) {
    this.options = options || { };
    this.createElement();
    $(document.body).insert(this.element);
    this.element.observe("click", this.onClick.bind(this));
  },

  show: function() {
    this.resizeElement();
    this.element.show();
  },

  hide: function() {
    this.element.hide();
  },

  createElement: function() {
    this.element = new Element("div").hide();
    this.element.setStyle({
      position:   "absolute",
      top:        0,
      left:       0,
      background: this.options.background || "#000",
      opacity:    this.options.opacity || 0.50,
      zIndex:     this.options.zIndex || 1000
    });
  },

  resizeElement: function() {
    var dimensions = $(document.body).getDimensions();
    this.element.setStyle({
      width:  dimensions.width + "px",
      height: dimensions.height + "px"
    });
  },

  onClick: function(event) {
    this.element.fire("shade:clicked", { shade: this });
  }
});
DimZum.Window = Class.create({
  initialize: function(options) {
    this.options = options || { };
    this.createElements();
  },

  createElements: function() {
    if (this.options.element) {
      this.element  = this.options.element;
      this.viewport = this.element.down("div.viewport");

    } else {
      this.element  = new Element("div").hide();
      this.viewport = new Element("div").addClassName("viewport");
      this.controls = this.options.controls ||
        new Element("div").update('<a href="#/">Close</a>');

      this.element.insert(this.viewport);
      this.controls.show().addClassName("controls");
      this.element.insert(this.controls);
    }

    this.element.addClassName(this.options.className || "dim_zum_window");
    this.element.setStyle({
      position: "absolute",
      top:      0,
      left:     0,
      zIndex:   this.options.zIndex || 2000
    });

    this.purgatory = new Element("div").hide();

    $(document.body).insert(this.element);
    $(document.body).insert(this.purgatory);
  },

  showWithContents: function(contentElement) {
    this.adoptContents(contentElement);
    this.repositionWindow();
    this.element.show();
  },

  adoptContents: function(contentElement) {
    this.releaseContents();
    this.viewport.insert(contentElement);
    this.hasContents = true;
    contentElement.show();
  },

  getContents: function() {
    if (this.hasContents)
      return this.viewport.down();
  },

  releaseContents: function() {
    var contents = this.getContents();
    if (contents) {
      contents.hide();
      this.purgatory.insert(contents);
    }

    this.hasContents = false;
  },

  repositionWindow: function() {
    var windowDimensions   = this.element.getDimensions();
    var viewportDimensions = document.viewport.getDimensions();
    var viewportOffsets    = document.viewport.getScrollOffsets();

    var xOffsetFactor = this.options.xOffset || 0.5;
    var yOffsetFactor = this.options.yOffset || 0.5;

    var left = viewportDimensions.width * xOffsetFactor - windowDimensions.width * xOffsetFactor;
    var top  = viewportDimensions.height * yOffsetFactor - windowDimensions.height * yOffsetFactor;

    this.element.setStyle({
      left: viewportOffsets.left + left + "px",
      top:  viewportOffsets.top + top + "px"
    });
  },

  hide: function() {
    this.releaseContents();
    this.element.hide();
  },

  clearPurgatory: function() {
    this.purgatory.update("");
  }
});

/* Add support for specifying a Selector for containment */

Object.extend(Droppables, {
  add: Droppables.add.wrap(function(proceed, element) {
    var options = arguments[2] || {}, containment = options.containment;

    if (containment && containment.expression && containment.match) {
      Droppables._containers_by_expression = Droppables._containers_by_expression || {};
      options._container_selector = containment;
      options._containers = 'selector';
      options.containment = null;
    }

    return proceed(element, options);
  }),

  isContained: Droppables.isContained.wrap(function(proceed, element, drop) {
    if (drop._container_selector && drop._containers == 'selector') {
      var selector = drop._container_selector, containers = Droppables._containers_by_expression;
      if (!containers[selector.expression])
        containers[selector.expression] = selector.findElements();
      drop._containers = containers[selector.expression];
    }

    return proceed(element, drop);
  }),

  reset: Droppables.reset.wrap(function(proceed) {
    Droppables._containers_by_expression = {};

    this.drops.each(function(drop) {
      if (drop._container_selector)
        drop._containers = 'selector';
    });

    return proceed();
  })
});

/*--------------------------------------------------------------------------*/

Widget = {
  beforeDragRequestHandlers: [],

  serialize: function(widget) {
    widget = $(widget || 'widgets');
    var elements = Selector.matchElements(widget.immediateDescendants(), 'div.widget');
    return elements.invoke('readAttribute', 'record').map(function(record) {
      return 'records[]=' + encodeURIComponent(record);
    }).join('&');
  },

  makeDragRequest: function(url, container) {
    container = $(container);
    var widget = Draggables.activeDraggable.element;
    var widgetParent = widget.up('div.widget_parent');
    if (widgetParent != container) return;

    for (var i = 0, length = Widget.beforeDragRequestHandlers.length; i < length; i++)
      if (!Widget.beforeDragRequestHandlers[i](widget, widgetParent)) return false;

    new Ajax.Request(url, {
      parameters: $H({
        container: (container.up('div.widget') || container.up('div.page.content')).id,
        record: widget.getAttribute('record')
      }).toQueryString() + '&' + Widget.serialize(container)
    });
  },

  onItemEditKeyPress: function(event) {
    element = Event.element(event);
    if (event.keyCode == 13) {
      element.up('form').onsubmit();
      Event.stop(event);
    }
  },

  ifWidgetHasNoChildren: function(widget, callback) {
    widget = $(widget);
    if (!widget.down('div.widget', 1)) callback();
  }
};

Draggables.addObserver({
  onStart: function(eventName, draggable, event) {
    if (window.Nubbins) Nubbins.stop();
  },

  onEnd: function(eventName, draggable, event) {
    if (window.Nubbins) Nubbins.start();
  }
});

var Sortables = Sortable;

/*--------------------------------------------------------------------------*/

var Enumerator = Class.create();
Object.extend(Enumerator.prototype, Enumerable);
Object.extend(Enumerator.prototype, (function() {
  var values = [], value, options;

  function isFirst() {
    return values.length == 0;
  }

  function next(index) {
    value = isFirst() ? options.first() : options.next(value, index);
    values.push(value);
    return value;
  }

  return {
    initialize: function(_options) {
      options = _options;
    },

    _each: function(iterator) {
      if (isFirst()) {
        var index = 0;
        while (true) iterator(next(index++));
      } else {
        values.each(iterator);
      }
    },

    backgroundEach: function(iterator, options) {
      options = options || {};
      var index = 0, performIteration = function() {
        try {
          iterator(next(index), index);
          performIteration.defer();
          index++;
        } catch (e) {
          if (e != $break) throw e;
          if (options.afterFinish) options.afterFinish.defer();
        }
      };
      performIteration.defer();
    },

    reset: function() {
      values.clear();
    }
  };
})());

/* Wraps an Enumerable in an Enumerator */

function $E(enumerable) {
  var values = enumerable.toArray();

  return new Enumerator({
    first: function() {
      if (!values.length) throw $break;
      return values.first();
    },

    next:  function(value, index) {
      if (index >= values.length) throw $break;
      return values[index];
    }
  });
}

/*--------------------------------------------------------------------------*/

/* Preload these images */

function preload() {
  var all = $$('link[href*="/all.css"]'), protocol = '', domain = '';

  if (all.length > 0) {
    url = all.first().readAttribute('href').match(/^(.*?:)(\/\/.*?)\//);
    if (url) protocol = url[1], domain = url[2];
  }

  $A(arguments).each(function(path) {
    var src = protocol + domain + path;
    new Image().src = src;
  });
}

document.observe("dom:loaded", function() {
  preload(
    "/images/post_a_new_message-pressed.gif",
    "/images/add_a_new_milestone-pressed.gif",
	  "/images/new_project-pressed.gif",
    "/images/create_a_writeboard-pressed.gif",
    "/images/new_to-do_list-pressed.gif",
    "/images/upload_a_file-pressed.gif",
    "/images/upload_a_new_version-pressed.gif",
    "/images/project_switcher-shadow-bottom.gif",
    "/images/project_switcher-shadow-bottom.png",
    "/images/project_switcher-shadow-top.gif",
    "/images/project_switcher-shadow-top.png",
    "/images/nubbin.gif",
    "/images/drag_handle.gif",
    "/images/quick_window/left_right-shadow.png",
    "/images/quick_window/nubbin.png",
    "/images/quick_window/optimized-shadow.png"
  );
});

/* Enable nubbins */

Event.observe(window, "load", function() {
  if (Prototype.Browser.MobileSafari)
    $(document.body).addClassName("iphone");

  if ($(document.body).hasClassName("nubbins")) {
    window.Nubbins = new HoverObserver("screen_body");
  }
});

/* Unfold anchored sheets automatically */

Event.observe(window, 'load', function() {
  if (window.location.hash) {
    var element = $(window.location.hash.substr(1));
    if (element && element.hasClassName('sheet')) {
      Layout.swapWithScreenBody(element);
    }
  }
});

/* Process after-load callbacks */

window.afterLoad = [];

Event.observe(window, 'load', function() {
  if (window.afterLoad.length) {
    (function() {
      $E(window.afterLoad).backgroundEach(function(callback) {
        callback();
      });
    }).delay(0.25);
  }
});
var CalendarDate = Class.create({
  initialize: function(year, month, day) {
    this.date  = new Date(Date.UTC(year, month - 1));
    this.date.setUTCDate(day);

    this.year  = this.date.getUTCFullYear();
    this.month = this.date.getUTCMonth() + 1;
    this.day   = this.date.getUTCDate();
    this.value = this.date.getTime();
  },

  beginningOfMonth: function() {
    return new CalendarDate(this.year, this.month, 1);
  },

  beginningOfWeek: function() {
    return this.previous(this.date.getUTCDay());
  },

  next: function(value) {
    if (value === 0) return this;
    return new CalendarDate(this.year, this.month, this.day + (value || 1));
  },

  previous: function(value) {
    if (value === 0) return this;
    return this.next(-(value || 1));
  },

  succ: function() {
    return this.next();
  },

  equals: function(calendarDate) {
    return this.value == calendarDate.value;
  },

  isWeekend: function() {
    var day = this.date.getUTCDay();
    return day == 0 || day == 6;
  },

  getMonthName: function() {
    return CalendarDate.MONTHS[this.month - 1];
  },

  toString: function() {
    return this.stringValue = this.stringValue ||
      [this.year, this.month, this.day].invoke("toPaddedString", 2).join("-");
  }
});

Object.extend(CalendarDate, {
  MONTHS:   $w("January February March April May June July August September October November December"),
  WEEKDAYS: $w("Sunday Monday Tuesday Wednesday Thursday Friday Saturday"),

  parse: function(date) {
    if (!(date || "").toString().strip()) {
      return CalendarDate.parse(new Date());

    } else if (date.constructor == Date) {
      return new CalendarDate(date.getFullYear(), date.getMonth() + 1, date.getDate());

    } else if (Object.isArray(date)) {
      var year = date[0], month = date[1], day = date[2];
      return new CalendarDate(year, month, day);

    } else {
      return CalendarDate.parse(date.toString().split("-"));
    }
  }
});
var CalendarDateSelect = Class.create({
  initialize: function(field, options) {
    this.field   = $(field);
    this.options = options || {};

    this.onFieldChanged();
    this.createElement();
    this.field.insert({ after: this });
  },

  createElement: function() {
    this.element = new Element("div", { className: "calendar_date_select" });

    this.header = new Element("div", { className: "header" });
    this.pager = new CalendarDateSelect.Pager(this.cursor);
    this.header.insert(this.pager);
    this.element.insert(this.header);

    this.body = new Element("div", { className: "body" });
    this.updateBody();
    this.element.insert(this.body);

    this.footer = new Element("div", { className: "footer" });
    this.title = new Element("span").update((this.options.title || "Due:") + " ");
    this.description = new Element("span");
    this.updateDescription();
    this.footer.insert(this.title);
    this.footer.insert(this.description);
    this.element.insert(this.footer);

    this.element.observe("calendar:cursorChanged", this.onCursorChanged.bind(this));
    this.element.observe("calendar:dateSelected", this.onDateSelected.bind(this));
    this.element.observe("calendar:fieldChanged", this.onFieldChanged.bind(this));
  },

  onCursorChanged: function(event) {
    this.setCursor(event.memo.cursor);
  },

  onDateSelected: function(event) {
    this.setDate(event.memo.date);
  },

  onFieldChanged: function(event) {
    this.setDate(CalendarDate.parse($F(this.field)));
    this.setCursor(this.date);
  },

  setCursor: function(date) {
    this.cursor = date.beginningOfMonth();
    this.updateBody();
  },

  setDate: function(date) {
    this.date = date;
    this.field.setValue(this.date);
    this.updateDescription();
  },

  updateBody: function() {
    if (this.body) {
      this.grid = new CalendarDateSelect.Grid(this.date, this.cursor);
      this.body.update(this.grid);
    }
  },

  updateDescription: function() {
    if (this.description) {
      var description = "#{month} #{day}, #{year}".interpolate({
        month: this.date.getMonthName(), day: this.date.day, year: this.date.year
      });

      if (this.description.parentNode) {
        var element = new Element("span").update(description);
        this.description.replace(element);
        this.description = element;
      } else {
        this.description.update(description);
      }
    }
  },

  toElement: function() {
    return this.element;
  }
});


CalendarDateSelect.Pager = Class.create({
  initialize: function(cursor) {
    this.cursor = cursor;
    this.createElement();
  },

  createElement: function() {
    this.element = new Element("div", { className: "pager" });

    this.left = new Element("a", { href: "#", method: "previous" });
    this.left.update('<img src="/images/calendar_date_select-previous_month.gif" />');
    this.left.observe("click", this.onButtonClicked.bind(this));
    this.element.insert(this.left);

    this.select = new Element("select", { className: "months" });
    this.updateSelect();
    this.select.observe("change", this.onSelectChanged.bind(this));
    this.element.insert(this.select);

    this.right = new Element("a", { href: "#", method: "next" });
    this.right.update('<img src="/images/calendar_date_select-next_month.gif" />');
    this.right.observe("click", this.onButtonClicked.bind(this));
    this.element.insert(this.right);
  },

  onButtonClicked: function(event) {
    var element = event.findElement("a[method]");
    if (element) {
      this[element.readAttribute("method")]();
      event.stop();
    }
  },

  onSelectChanged: function(event) {
    this.setCursor(CalendarDate.parse($F(this.select)));
  },

  previous: function() {
    this.setCursor(this.cursor.beginningOfMonth().previous());
  },

  next: function() {
    this.setCursor(new CalendarDate(this.cursor.year, this.cursor.month + 1, 1));
  },

  setCursor: function(cursor) {
    cursor = cursor.beginningOfMonth();
    var event = this.element.fire("calendar:cursorChanged", { cursor: cursor });

    if (!event.stopped) {
      var oldCursor = this.cursor;
      this.cursor = cursor;
      this.updateSelect(oldCursor);
    }
  },

  updateSelect: function(oldCursor) {
    if (!oldCursor || this.cursor.year != oldCursor.year) {
      this.months = this.getDatesForSurroundingMonths();
      this.select.options.length = 0;
      this.getDatesForSurroundingMonths().each(function(date, index) {
        var title = [date.getMonthName().slice(0, 3), date.year].join(" ");
        this.select.options[index] = new Option(title, date.toString());
        if (this.cursor.equals(date)) this.select.selectedIndex = index;
      }, this);

    } else {
      this.select.selectedIndex = this.months.pluck("value").indexOf(this.cursor.value);
    }
  },

  getDatesForSurroundingMonths: function() {
    return $R(this.cursor.year - 1, this.cursor.year + 2).map(function(year) {
      return $R(1, 12).map(function(month) {
        return new CalendarDate(year, month, 1);
      });
    }).flatten();
  },

  toElement: function() {
    return this.element;
  }
});


CalendarDateSelect.Grid = Class.create({
  initialize: function(date, cursor) {
    this.date    = CalendarDate.parse(date);
    this.cursor  = CalendarDate.parse(cursor).beginningOfMonth();
    this.today   = CalendarDate.parse();

    this.createElement();
  },

  createElement: function() {
    var table = new Element("table");
    var tbody = new Element("tbody");
    var html  = [];

    html.push('<tr class="weekdays">');
    CalendarDate.WEEKDAYS.each(function(weekday) {
      html.push("<th>", weekday.substring(0, 1), "</th>");
    });
    html.push("</tr>");

    this.getWeeks().each(function(week) {
      html.push('<tr class="days">');
      week.each(function(date) {
        html.push('<td class="', this.getClassNamesForDate(date).join(" "));
        html.push('" date="', date, '"><a href="#">', date.day, "</a></td>");
      }, this);
      html.push("</tr>");
    }, this);

    tbody.insert(html.join(""));
    table.insert(tbody);
    table.observe("click", this.onDateClicked.bind(this));

    return this.element = table;
  },

  getStartDate: function() {
    return this.cursor.beginningOfWeek();
  },

  getEndDate: function() {
    return this.getStartDate().next(41);
  },

  getDates: function() {
    return $R(this.getStartDate(), this.getEndDate());
  },

  getWeeks: function() {
    return this.getDates().inGroupsOf(7);
  },

  getClassNamesForDate: function(date) {
    var classNames = [];

    if (date.equals(this.today)) classNames.push("today");
    if (date.equals(this.date))  classNames.push("selected");
    if (date.isWeekend())        classNames.push("weekend");
    if (!date.beginningOfMonth().equals(this.cursor))
      classNames.push("other");

    return classNames;
  },

  onDateClicked: function(event) {
    var element = event.findElement("td[date]");
    if (element) {
      this.selectDate(element);
      event.stop();
    }
  },

  selectDate: function(element) {
    var date  = CalendarDate.parse(element.readAttribute("date"));
    var event = element.fire("calendar:dateSelected", { date: date });

    if (!event.stopped) {
      var selection = this.element.down("td.selected");
      if (selection) selection.removeClassName("selected");

      this.selectedElement = element;
      this.date = date;

      element.addClassName("selected");
    }
  },

  toElement: function() {
    return this.element;
  }
});
/* ------------------------------------------------------------------------
 * categories.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

categories = {
  toggleEdit: function() {
    if($('edit_categories_link')['bc:active']) {
      Element.activate('edit_categories_link', false)
      $('CategoryList').removeClassName("editing")
    } else {
      Element.activate('edit_categories_link', true)
      $('CategoryList').addClassName("editing")
    }
    $('add_new_category').toggle();
  },

  toggleOperationSpinner: function(id) {
    Element.toggle('operation_wait_' + id,
      'operation_rename_' + id, 'operation_delete_' + id)
  },

  cancelEdit: function(id) {
    $('edit_category_' + id).remove()
    $('category_menu_item_' + id).show()
  },

  edit: function(id, name, url) {
    name = prompt("Rename this category", name);
    if(name) {
      this.toggleOperationSpinner(id);
      new Ajax.Request(url,
        { asynchronous: true,
          evalScripts:  true,
          method:       'put',
          parameters:   'category[name]=' + encodeURIComponent(name),
          onFailure:    function(req) { categorySelect.addFailed(req) }});
    }
  },

  addNew: function() {
    toggle = function() { $('add_new_category_link', 'add_new_category_spinner').each(Element.toggle); };
    categories.add({ addFailed: toggle, validName: toggle });
  },

  add: function(options) {
    options = options || {};
    var name = prompt("Enter the new category name:", "");
    if(name) name = name.strip()
    if(!name || name.length < 1) {
      if(options.invalidName) options.invalidName();
    } else {
      if(options.validName) options.validName(name);
      new Ajax.Request(this.url, {asynchronous:true, evalScripts:true,
        parameters:'category[name]=' + encodeURIComponent(name),
        onFailure: function(req) { categories.addFailed(req, options); }
      });
    }
  },

  addFailed: function(request, options) {
    alert("An error prevented the category from being added. Please try again.")
    if(options.addFailed) options.addFailed(req);
  }
}

categorySelect = {
  controls: [],

  register: function(id) {
    var control = $(id)
    this.controls.push(control)
    Event.observe(control, 'change', this.detectChange.bind(this))
  },

  detectChange: function(event) {
    var control = Event.element(event)
    if(control.selectedIndex == control.options.length - 1) {
      categories.add({
        invalidName: function() {
          control.selectedIndex = 0;
        },

        validName: function(name) {
          categorySelect.control = control
          categorySelect.enableControls(false)
        },

        addFailed: function(req) {
          categorySelect.enableControls(true)
          categorySelect.control.selectedIndex = 0
       }
      });
    }
  },

  enableControls: function(setting) {
    this.controls.each(function(item) {
      item.disabled = !setting;
    })
  },

  addCategory: function(id, name, position) {
    position++
    this.controls.each(function(item){
      var options = $A(item.options)
      options.splice(position, 0, new Option(name, id))
      for(var idx = 0; idx < options.length; idx++) {
        item.options[idx] = options[idx]
      }
    })
    this.reset(position);
  },

  reset: function(selected) {
    if(this.control) this.control.selectedIndex = (selected || 0);
    this.enableControls(true)
  },

  renameCategory: function(id, name) {
    this.controls.each(function(item){
      for(var idx = 0; idx < item.options.length; idx++) {
        if(parseInt(item.options[idx].value) == id) {
          item.options[idx].text = name;
          break;
        }
      }
    })
  },

  deleteCategory: function(id) {
    this.controls.each(function(item){
      for(var idx = 0; idx < item.options.length; idx++)
        if(parseInt(item.options[idx].value) == id) {
          item.options[idx] = null;
          break;
        }
    })
  }
}
var Color = {
  TOLERANCE: 0.0000000001
};

Color.HSV = Class.create({
  initialize: function(h, s, v) {
    this.h = h > 1 ? 1 : h < 0 ? 0 : h;
    this.s = s > 1 ? 1 : s < 0 ? 0 : s;
    this.v = v > 1 ? 1 : v < 0 ? 0 : v;
  },

  toRGB: function() {
    var h = this.h, s = this.s, v = this.v;
    if (h + Color.TOLERANCE >= 1) h = 0;
    h *= 6;

    var i = parseInt(h);
    var f = h - i;
    var p = v * (1 - s);
    var q = v * (1 - s * f);
    var t = v * (1 - s * (1 - f));

    var r, g, b;

    switch (i) {
      case 0: r = v, g = t, b = p; break;
      case 1: r = q, g = v, b = p; break;
      case 2: r = p, g = v, b = t; break;
      case 3: r = p, g = q, b = v; break;
      case 4: r = t, g = p, b = v; break;
      case 5: r = v, g = p, b = q; break;
    }

    return new Color.RGB(Math.round(r * 255), Math.round(g * 255), Math.round(b * 255));
  },

  toHSV: function() {
    return this;
  },

  toHTML: function() {
    return this.toRGB().toHTML();
  }
});

Color.RGB = Class.create({
  initialize: function(r, g, b) {
    this.r = parseInt(r > 255 ? 255 : r < 0 ? 0 : r);
    this.g = parseInt(g > 255 ? 255 : g < 0 ? 0 : g);
    this.b = parseInt(b > 255 ? 255 : b < 0 ? 0 : b);
  },

  toHSV: function() {
    var r = this.r, g = this.g, b = this.b;
    var max = Math.max(r, g, b), min = Math.min(r, g, b);
    var d = max - min, h, s = max > 0 ? d / max : 0, v = max;

    if (s - Color.TOLERANCE <= 0) {
      h = 0;
    } else {
      if (max == r) {
        h = (g - b) / d;
      } else if (max == g) {
        h = 2 + (b - r) / d;
      } else {
        h = 4 + (r - g) / d;
      }
    }

    if (h < 0) h += 6;
    h /= 6, v /= 255;

    return new Color.HSV(h, s, v);
  },

  toRGB: function() {
    return this;
  },

  toHTML: function() {
    var html = "#" + this.r.toColorPart() + this.g.toColorPart() + this.b.toColorPart();
    return html;
  }
});

Color.RGB.fromHTML = function(html) {
  var color = (html.toString().match(/#?([0-9A-Fa-f]{3}(?:[0-9A-Fa-f]{3})?)/) || [])[1];

  if (color) {
    if (color.length == 3) {
      color = color.split("");
      var r = color[0] + color[0], g = color[1] + color[1], b = color[2] + color[2];
    } else {
      var r = color.slice(0, 2), g = color.slice(2, 4), b = color.slice(4, 6);
    }

    return new Color.RGB(parseInt(r, 16), parseInt(g, 16), parseInt(b, 16));
  }
};
var ColorPicker = Class.create({
  initialize: function(element, color) {
    this.element   = $(element);
    this.satPicker = this.element.down("div.saturation_and_brightness_picker");
    this.satCursor = this.satPicker.down("div.cursor");
    this.huePicker = this.element.down("div.hue_picker");
    this.hueCursor = this.huePicker.down("div.cursor");
    this.document  = document;
    this.observers = $H();

    this.setColor(Color.RGB.fromHTML(color || "#f00"));
    this.start();
  },

  start: function() {
    if (this.observers.keys().length) return;
    this.observe("satPicker", "mousedown", "didStartSatPickerDrag");
    this.observe("huePicker", "mousedown", "didStartHuePickerDrag");
  },

  stop: function() {
    this.observers.keys().each(function(o) {
      this.stopObserving(o);
    }, this);
  },

  observe: function(elementName, eventName, methodName) {
    var key = $A(arguments).join(":");
    var observer = this[methodName].bind(this), element = this[elementName];
    element.observe(eventName, observer);
    this.observers.set(key, { element: element, event: eventName, observer: observer });
  },

  stopObserving: function() {
    var o = this.observers.get($A(arguments).join(":"));
    if (o) o.element.stopObserving(o.event, o.observer);
  },

  setColor: function(color) {
    var hsv = color.toHSV();
    if (hsv.s > 0) this.setHue(parseInt(hsv.h * 255), true);
    this.setSaturationAndValue(parseInt(hsv.s * 255), parseInt(hsv.v * 255), true);
    this.color = color;
    this.fireChangedEvent();
  },

  setColor: function(color, animate) {
    var hsv = color.toHSV();
    var h = this.h, s = parseInt(hsv.s * 255), v = parseInt(hsv.v * 255);
    if (!h || hsv.s > 0) h = parseInt(hsv.h * 255);

    var finish = (function() {
      this.color = color;
      this.fireChangedEvent();
    }).bind(this);

    if (animate) {
      this.effect = new Effect.Parallel([
        new Effect.Tween(this.element, this.h, h, function(position) {
          this.setHue(position, true);
        }.bind(this)),
        new Effect.Tween(this.element, this.s, s, function(position) {
          this.setSaturationAndValue(position, this.v, true);
        }.bind(this)),
        new Effect.Tween(this.element, this.v, v, function(position) {
          this.setSaturationAndValue(this.s, position, true);
        }.bind(this))
      ], {
        duration: 0.35,
        afterFinish: finish
      });
    } else {
      this.setHue(h, true);
      this.setSaturationAndValue(s, v, true);
      finish();
    }
  },

  updateColor: function() {
    this.color = new Color.HSV(this.h / 255, this.s / 255, this.v / 255);
    this.fireChangedEvent();
  },

  setHue: function(h, aggregate) {
    this.h = h < 0 ? 0 : h > 255 ? 255 : h;
    this.moveHueCursorTo(255 - this.h);
    this.updateSatPickerBackground();
    if (!aggregate) this.updateColor();
  },

  setSaturationAndValue: function(s, v, aggregate) {
    this.s = s < 0 ? 0 : s > 255 ? 255 : s;
    this.v = v < 0 ? 0 : v > 255 ? 255 : v;
    this.moveSatCursorTo(this.s, 255 - this.v);
    if (!aggregate) this.updateColor();
  },

  getColor: function() {
    return this.color;
  },

  didStartSatPickerDrag: function(event) {
    this.observe("document", "mousemove", "didDragSatPicker");
    this.observe("document", "mouseup", "didEndSatPickerDrag");
    this.didDragSatPicker(event);
  },

  didDragSatPicker: function(event) {
    var offsets = this.getOffsetsFrom("satPicker", event);
    this.setSaturationAndValue(offsets.left, 255 - offsets.top);
    event.stop();
  },

  didEndSatPickerDrag: function(event) {
    this.stopObserving("document", "mousemove", "didDragSatPicker");
    this.stopObserving("document", "mouseup", "didEndSatPickerDrag");
    event.stop();
  },

  didStartHuePickerDrag: function(event) {
    this.observe("document", "mousemove", "didDragHuePicker");
    this.observe("document", "mouseup", "didEndHuePickerDrag");
    this.didDragHuePicker(event);
  },

  didDragHuePicker: function(event) {
    var offsets = this.getOffsetsFrom("huePicker", event);
    this.setHue(255 - offsets.top);
    event.stop();
  },

  didEndHuePickerDrag: function(event) {
    this.stopObserving("document", "mousemove", "didDragHuePicker");
    this.stopObserving("document", "mouseup", "didEndHuePickerDrag");
    event.stop();
  },

  getOffsetsFrom: function(elementName, event) {
    var element = this[elementName];
    var offset  = element.cumulativeOffset();
    return { left: event.pointerX() - offset.left, top: event.pointerY() - offset.top };
  },

  moveSatCursorTo: function(x, y) {
    this.satCursor.setStyle({ left: x + "px", top: y + "px" });
  },

  moveHueCursorTo: function(y) {
    this.hueCursor.setStyle({ top: y + "px" });
  },

  updateSatPickerBackground: function() {
    var color = new Color.HSV(this.h / 255, 1, 1).toRGB();
    this.satPicker.setStyle({ backgroundColor: color.toHTML() });
  },

  fireChangedEvent: function() {
    this.element.fire("color:changed", { color: this.color });
  }
});
var ColorScheme = {
  styles: {
    "header_background":    ["backgroundColor"],
    "client_name":          ["color"],
    "project_name":         ["color"],
    "current_tab_text":     ["color"],
    "tab_background":       ["backgroundColor", "borderColor"],
    "tab_text":             ["color"],
    "tab_hover_background": ["backgroundColor", "borderColor"],
    "tab_hover_text":       ["color"],
    "link_text":            ["color"]
  },

  initialize: function(colors) {
    this.setSwatchColors(colors);
    this.rememberOriginalColors();
  },

  getSwatch: function(swatch) {
    return this.getSwatchInput(swatch).up("div.color_swatch");
  },

  getSwatchInput: function(swatch) {
    return $(swatch + "_input");
  },

  setSwatchColor: function(swatch, color) {
    this.getSwatchInput(swatch).setValue(color);
    this.getSwatch(swatch).setStyle({ backgroundColor: "#" + color });
    this.updateSwatchPreview(swatch);
  },

  getSwatchColor: function(swatch) {
    return "#" + this.getSwatchInput(swatch).getValue();
  },

  editSwatchColor: function(swatch) {
    ColorScheme.SwatchEditor.edit(swatch);
  },

  updateSwatchPreview: function(swatch) {
    var preview = $(swatch + "_preview");
    if (preview) {
      var color = this.getSwatchColor(swatch);
      this.styles[swatch].each(function(style) {
        preview.style[style] = color;
      });
    }
  },

  setSwatchColors: function(colors) {
    ColorScheme.SwatchEditor.close();
    $H(colors).each(function(pair) {
      this.setSwatchColor.apply(this, pair);
    }, this);
  },

  setCustomScheme: function() {
    $("custom_scheme_selector").checked = "checked";
  },

  serialize: function() {
    return Form.serialize("scheme_colors");
  },

  rememberOriginalColors: function() {
    this.originalColors = this.serialize();
  },

  colorsHaveChanged: function() {
    return this.originalColors && (this.originalColors != this.serialize());
  },

  onSave: function() {
    this.rememberOriginalColors();
  },

  onCancel: function() {
    this.rememberOriginalColors();
  },

  onUnload: function() {
    if (this.colorsHaveChanged()) {
      return "The changes to your color settings will NOT be saved.";
    } else {
      return;
    }
  },

  SwatchEditor: {
    edit: function(swatch) {
      this.close(true);
      this.swatch = swatch;
      this.originalColor = this.getSwatchColor();
      this.getSwatchContainer().addClassName("selected");
      this.show(ColorScheme.getSwatchColor(swatch));
    },

    close: function(fromEdit) {
      if (this.swatch) {
        this.getSwatchContainer().removeClassName("selected");
        this.swatch = null;
        if (!fromEdit) this.hide();
      }
    },

    revert: function() {
      this.setColor(this.originalColor);
      this.show(this.originalColor);
    },

    show: function(color) {
      this.createEditor();
      this.picker.setColor(Color.RGB.fromHTML(color)/*, this.visible() */);
      this.editor.removeClassName("changed");
      this.editor.addClassName("editing");
    },

    hide: function() {
      this.editor.removeClassName("editing");
    },

    visible: function() {
      return this.editor.hasClassName("editing");
    },

    getSwatchContainer: function() {
      return ColorScheme.getSwatch(this.swatch).up(".color");
    },

    getSwatchColor: function() {
      return ColorScheme.getSwatchColor(this.swatch).slice(1);
    },

    getColor: function() {
      return this.picker.getColor().toHTML().slice(1);
    },

    setColor: function(color) {
      ColorScheme.setSwatchColor(this.swatch, color);
      ColorScheme.setCustomScheme();
    },

    createEditor: function() {
      if (!this.editor) {
        this.editor = $("swatch_editor");

        var element = this.editor.down(".color_picker");
        this.picker = new ColorPicker(element);
        element.observe("color:changed", this.onColorChanged.bind(this));

        this.input = this.editor.down("input.color");
        this.input.observe("change", this.onInputChanged.bind(this));
      }
    },

    onColorChanged: function(event) {
      var color = this.getColor();
      this.setColor(color);
      this.input.setValue("#" + color);
      this.editor.addClassName("changed");
    },

    onInputChanged: function(event) {
      var color = Color.RGB.fromHTML(this.input.getValue());
      if (color) {
        this.picker.setColor(color);
      } else {
        this.input.setValue("#" + this.getColor());
      }
    }
  }
};

document.observe("dom:loaded", function() {
  if ($(document.body).hasClassName("appearance")) {
    preload(
      "/images/color_picker/arrow.png",
      "/images/color_picker/circle.png",
      "/images/color_picker/hue.png",
      "/images/color_picker/saturation_and_brightness.png"
    );
    window.onbeforeunload = ColorScheme.onUnload.bind(ColorScheme);
  }
});
/* ------------------------------------------------------------------------
 * common.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

function waittofade() {
	if (document.getElementById('fade')) {
    setTimeout("fadeIn(7)", 1000);
	 }
}

function fadeIn(where) {
    if (where >= 1) {
        document.getElementById('fade').style.backgroundColor = "#ffff" + Color[where];
		  if (where > 1) {
			  where -= 1;
			  setTimeout("fadeIn("+where+")", 200);
			} else {
			  where -= 1;
			  setTimeout("fadeIn("+where+")", 200);
			  document.getElementById('fade').style.backgroundColor = "transparent";
			}
    }
}

function validateField(fieldId, alertMessage) {
    if (document.getElementById(fieldId).value == "") {
        alert(alertMessage);
        document.getElementById(fieldId).focus();
        return false;
    } else {
        return true;
    }
}

function popup(url,width,height) {
        window.open(url,'popup','width='+width+',height='+height+',scrollbars=auto,resizable=yes,toolbar=no,directories=no,menubar=no,status=no,left=100,top=100');
        return false;
}

function milestoneResponsibleParty(control, currentUserId, suffix) {
  var item = control.options[control.selectedIndex];
  var match = control.name.match(/\[(\d+)\]/);
  suffix = suffix || "";
  suffix += match ? ("_" + match[1]) : "";
  if(item.value.match(/^c/)) {
    Element.hideIf('reminder' + suffix)
  } else {
    Element.showIf('reminder' + suffix)
  }
  if(item.value.match(new RegExp("^" + currentUserId + "$"))) {
    Element.hideIf('now_and')
  } else {
    Element.showIf('now_and')
  }
}

var ShowHide = Class.create();
ShowHide.prototype = {
  initialize: function(element, callbacks) {
    this.element   = element = $(element);
    this.effect    = element.getAttribute('effect') || 'slide';
    this.duration  = parseFloat(element.getAttribute('duration')) || 0.25;
    this.activeClassName = element.getAttribute('activeclassname') || 'active';
    this.callbacks = callbacks;
    this.active    = Element.visible(element);
    this.element.showHide = this;
  },

  togglers: function() {
    return document.getElementsByClassName('show_hide_toggler_' + this.element.id);
  },

  toggle: function() {
    if (this.callbacks.beforeToggle) this.callbacks.beforeToggle(this);
    Effect.toggle(this.element, this.effect, {
      duration: this.duration,
      afterFinish: function(effect) {
        effect.element.firstChild.style.bottom = '0px';
        (this.callbacks.afterToggle || Prototype.K)(this);
      }.bind(this)
    });
    this.active = !this.active;
    this.togglers().concat(this.element).each(this.adjustClassName.bind(this));
  },

  show: function() {
    if (this.active) return;
    this.toggle();
  },

  hide: function() {
    if (!this.active) return;
    this.toggle();
  },

  adjustClassName: function(element) {
    Element[this.active ? 'addClassName' : 'removeClassName'](element, this.activeClassName);
  }
}

/* A pretty little hack to make uploads not hang in Safari. Just call this
 * immediately before the upload is submitted. This does an Ajax call to
 * the server, which returns an empty document with the "Connection: close"
 * header, telling Safari to close the active connection. A hack, but
 * effective. */
function closeKeepAlive() {
  if (/AppleWebKit|MSIE/.test(navigator.userAgent)) {
    new Ajax.Request("/ping/close", { asynchronous:false });
  }
}
var Companies = {
  justOurCompany: function() {
    $('just_our_company').addClassName('highlight');
    $('another_company_too').removeClassName('highlight');
    $('select_another_company').hide();
    $('client_id').value = "";
  },

  anotherCompanyToo: function() {
    $('just_our_company').removeClassName('highlight');
    $('another_company_too').addClassName('highlight');
    $('select_another_company').show();
  },

  showCreateNewCompany: function() {
    $('new_company').show();
    $('existing_company').hide();
    $('new_client_name').focus();
  },

  showSelectExistingCompany: function() {
    $('new_company').hide();
    $('existing_company').show();
  }
}
/* ------------------------------------------------------------------------
 * contacts.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

contactsManager = {
  onRemoved: function(request, id) {
    new Effect.Fade("company_" + id, {duration: 0.5})
    $('clients_names').innerHTML = request.getResponseHeader("X-Clients-Names")
  },

  onAdd: function(from) {
    this.resetAdd()
    new Effect.BlindDown('AddCompany', { duration: 0.2, afterFinish: function() { $('client_name').focus(); } })
  },

  beginAdd: function() {
    if($('client_id') && !Field.present('client_name'))
      Element.show('add_company_indicator_1')
    else
      Element.show('add_company_indicator_2')
  },

  resetAdd: function() {
    Element.hideIf('add_company_indicator_1', 'add_company_indicator_2')
    Field.clear('client_name')
  },

  updateOptionsList: function(list, value) {
    if(!(list = $(list))) return
    list = list.options
    for(var i = 0; i < list.length; i += 1) {
      if(list[i].value == value) {
        Element.remove(list[i])
        break
      }
    }

    if(list.length == 0) {
      list[0] = new Option("")
    }
  },

  updateCompanyList: function(request) {
    var new_id = request.getResponseHeader("X-Client-Id")
    var insert_after = request.getResponseHeader("X-Insert-After")
    var content = request.responseText

    if($('clients_names')) {
      var clients_names = request.getResponseHeader("X-Clients-Names")
      $('clients_names').innerHTML = clients_names

      this.updateOptionsList('client_id', new_id)
    }
    var appear = true

    company = $('company_' + new_id)
    if(company) Element.remove(company)

    if(insert_after == "FRONT") {
      new Insertion.Top('clients_list', content)
    } else if(insert_after == "NONE") {
      new Insertion.Bottom('clients_list', content)
    } else {
      new Insertion.After('company_' + insert_after, content)
    }

    window.scrollTo(window.pageXOffset ||
                    document.documentElement.scrollLeft ||
                    document.body.scrollLeft || 0,
                    $('company_' + new_id).offsetTop)
    new Effect.Appear('company_' + new_id, {duration: 0.5})
  },

  onAdded: function(request) {
    Element.hide('AddCompany')
    if(request.status == 200) {
      this.updateCompanyList(request, true)
    }
  },

  addPerson: function(from, company_id) {
    this.resetAddPerson(company_id);
    new Effect.BlindDown('AddPerson_' + company_id, {duration: 0.2});
    $('AddPerson_' + company_id).scrollTo();
  },

  resetAddPerson: function(company_id) {
    Element.hide('AddPersonError_' + company_id);
    Field.clear('person_first_name_' + company_id);
    Field.clear('person_last_name_' + company_id);
    Field.clear('person_email_address_' + company_id);
    Field.clear('person_user_name_' + company_id);
    Field.clear('person_password_' + company_id);
    Element.hideIf('add_person_indicator_' + company_id + "_existing",
                   'add_person_indicator_' + company_id + "_new")
  },

  beginPersonAdd: function(company_id, mode) {
    Element.hide('AddPersonError_' + company_id)
    if(mode == "existing") {
      Element.show('add_person_indicator_' + company_id + '_existing')
    } else {
      Element.show('add_person_indicator_' + company_id + '_new')
    }
  },

  onPersonAdded: function(request, company_id) {
    if(request.status == 200) {
      window.location.reload();
    } else {
      $('AddPersonError_' + company_id).innerHTML = "<p>" + request.responseText + "</p>"
      Element.show('AddPersonError_' + company_id)
      Element.hideIf('add_person_indicator_' + company_id + '_existing')
      Element.hideIf('add_person_indicator_' + company_id + '_new')
    }
  },

  onPersonRemoved: function(request) {
    if(request.status == 200) {
      this.updateCompanyList(request)
    }
  },

  switchToOpenId: function() {
    this.showOpenId();
    $('open_id_verification_notice').show();
    this.clearAuthenticationFields();
  },

  showOpenId: function() {
    $('open_id').show();
    $('user_name_and_password').hide();
    $('person_identity_url').focus();
  },

  switchToUserNameAndPassword: function() {
    this.showUserNameAndPassword();
    $('open_id_verification_notice').hide();
    this.clearAuthenticationFields();
  },

  showUserNameAndPassword: function() {
    $('user_name_and_password').show();
    $('open_id').hide();
    $('person_user_name').focus();
  },

  clearAuthenticationFields: function() {
    this.clearIdentityUrl();
    this.clearUserNameAndPassword();
  },

  clearIdentityUrl: function() {
    $('person_identity_url').clear();
  },

  clearUserNameAndPassword: function() {
    $('person_user_name').clear();
    $('person_password').clear();
  },

  clearHiddenAuthenticationFields: function() {
    if ($('open_id').style.display == "none") {
      this.clearIdentityUrl();
    } else {
      this.clearUserNameAndPassword();
    }
  }
}

ContactsManager = contactsManager; // Hack to please update_page when using page.contacts_manager
/* ------------------------------------------------------------------------
 * custom.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

Element.empty = function(id) {
  return $(id).innerHTML.match(/^\s*$/);
}

Element.showIf = function() {
  for(var i = 0; i < arguments.length; i++ ) {
    var element = $(arguments[i])
    if(element) Element.show(element)
  }
}

Element.hideIf = function() {
  for(var i = 0; i < arguments.length; i++ ) {
    var element = $(arguments[i])
    if(element) Element.hide(element)
  }
}

Element.getY = function(element) {
  if(element.y) return element.y
  if(element.offsetTop || element.offsetParent) {
    var y = element.offsetTop
    while(element = element.offsetParent) y += element.offsetTop
    return y
  }
  return 0
}

Element.resizeTo = function(container, extra) {
  container = $(container)
  var width = container.clientWidth || container.scrollWidth
  width += extra // a hack to account for margins, padding, etc.
  if(width > 0) {
    for(var i = 2; i < arguments.length; i++)
      $(arguments[i]).style.width = width + "px"
  }
}

window.installResizerFor = function() {
  var container_and_elements = arguments

  var current_onload = window.onload
  window.onload = function() {
    if(current_onload) current_onload()
    Element.resizeTo.apply(Element, container_and_elements)
  }

  var current_onresize = window.onresize
  window.onresize = function() {
    var size = {}
    size.width = window.innerWidth ||
      document.documentElement && document.documentElement.clientWidth ||
      document.body.clientWidth
    size.height = window.innerHeight ||
      document.documentElement && document.documentElement.clientHeight ||
      document.body.clientHeight

    /* keep track of the size from the last resize, because IE likes to call
     * resize over and over even if the window hasn't really resized. */

    if(window.last_size && window.last_size.width == size.width && window.last_size.height == size.height)
      return
    window.last_size = size

    if(current_onresize) current_onresize()
    Element.resizeTo.apply(Element, container_and_elements)
  }
}

Element.activate = function(element, activate) {
  element = $(element)

  var inactive_text = element['bc:inactive_text']
  if(!inactive_text) {
    element['bc:inactive_text'] = element.innerHTML
    inactive_text = element.innerHTML
  }

  var active_text = element.getAttribute('bc:active_text') || element.innerHTML
  var active_class = element.getAttribute('bc:active_class') || element.className

  if(!activate) {
    element.innerHTML = inactive_text
    if(active_class) Element.removeClassName(element, active_class)
    element['bc:active'] = false
  } else {
    element.innerHTML = active_text
    if(active_class) Element.addClassName(element, active_class)
    element['bc:active'] = true
  }
}

Effect.Zoom = Class.create()
Effect.Zoom.prototype = {
  initialize: function(from, to, duration, onFinish) {
    this.target = $(to)
    this.initializeZoomer()

    var from = $(from)

    this.onFinish = onFinish

    this.target.style.opacity = 0
    this.target.style.visibility = "hidden"
    Element.show(this.target)

    this.startTop = this.getY(from)
    this.startLeft = this.getX(from)
    var endTop = this.getY(this.target)
    var endLeft = this.getX(this.target)
    this.steps = 30.0 * duration
    this.dx = (endLeft - this.startLeft) / this.steps
    this.dy = (endTop - this.startTop) / this.steps
    this.currentStep = 0
    this.zoomer.style.display = "block"
    this.zoom()
  },

  initializeZoomer: function() {
    this.zoomer = document.createElement("DIV")
    this.zoomer.id = "zoomer"
    this.target.parentNode.appendChild(this.zoomer)
  },

  getX: function(element) {
    if(element.x) return element.x
    if(element.offsetLeft || element.offsetParent) {
      var x = element.offsetLeft
      while(element = element.offsetParent) x += element.offsetLeft
      return x
    }
    return 0
  },

  getY: function(element) {
    return Element.getY(element)
  },

  zoom: function() {
    opacity = 100 - (100.0/this.steps) * this.currentStep
    this.zoomer.style.filter = "alpha(opacity=" + opacity + ")"
    this.zoomer.style.opacity = opacity/100

    var pct = this.currentStep / this.steps
    this.zoomer.style.top = this.startTop + this.dy * this.currentStep + "px"
    this.zoomer.style.left = this.startLeft + this.dx * this.currentStep + "px"
    this.zoomer.style.width = this.target.offsetWidth * pct + "px"
    this.zoomer.style.height = this.target.offsetHeight * pct + "px"

    this.currentStep++
    if(this.currentStep < this.steps)
      setTimeout(this.zoom.bind(this), 20)
    else {
      Element.remove(this.zoomer)
      this.target.style.opacity = 1
      this.target.style.visibility = "visible"
      if(this.onFinish) this.onFinish()
    }
  }
}

Effect.ZoomOut = Class.create()
Effect.ZoomOut.prototype = {
  initialize: function(from, to, time) {
    this.target = $(to)
    this.initializeZoomer()
    var from = $(from)

    this.startTop = this.getY(from)
    this.startLeft = this.getX(from)
    var endTop = this.getY(this.target)
    var endLeft = this.getX(this.target)
    this.startWidth = from.offsetWidth
    this.startHeight = from.offsetHeight
    var endWidth = this.target.offsetHeight
    var endHeight = this.target.offsetHeight
    this.steps = 30.0 * time
    this.dx = (endLeft - this.startLeft) / this.steps
    this.dy = (endTop - this.startTop) / this.steps
    this.dh = (endHeight - this.startHeight) / this.steps
    this.dw = (endWidth - this.startWidth) / this.steps
    this.currentStep = 0
    this.zoomer.style.display = "block"

    new Element.hide(from)
    this.zoom()
  },

  initializeZoomer: function() {
    this.zoomer = document.createElement("DIV")
    this.zoomer.id = "zoomer"
    this.target.parentNode.appendChild(this.zoomer)
  },

  getX: function(element) {
    if(element.x) return element.x
    if(element.offsetLeft || element.offsetParent) {
      var x = element.offsetLeft
      while(element = element.offsetParent) x += element.offsetLeft
      return x
    }
    return 0
  },

  getY: function(element) {
    return Element.getY(element)
  },

  zoom: function() {
    opacity = 100 - (100.0/this.steps) * this.currentStep
    this.zoomer.style.filter = "alpha(opacity=" + opacity + ")"
    this.zoomer.style.opacity = opacity/100

    var pct = this.currentStep / this.steps
    this.zoomer.style.top = this.startTop + this.dy * this.currentStep + "px"
    this.zoomer.style.left = this.startLeft + this.dx * this.currentStep + "px"
    this.zoomer.style.width = this.startWidth + this.dw * this.currentStep + "px"
    this.zoomer.style.height = this.startHeight + this.dh * this.currentStep + "px"

    this.currentStep++
    if(this.currentStep < this.steps)
      setTimeout(this.zoom.bind(this), 20)
    else {
      Element.remove(this.zoomer)
    }
  }
}
/* ------------------------------------------------------------------------
 * date.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

Date.MONTHS   = $w("January February March April May June July August September October November December");
Date.CANONICAL_WEEKDAYS = $w("Sunday Monday Tuesday Wednesday Thursday Friday Saturday");
Date.WEEKDAYS = Date.CANONICAL_WEEKDAYS;
Date.weekStartsOn = 0;

Date.startWeekOn = function(day) {
  if(day == Date.weekStartsOn) return;

  var list = [];
  for(var i = day; i < 7; i++) {
    list.push(Date.CANONICAL_WEEKDAYS[i]);
  }
  for(var i = 0; i < day; i++) {
    list.push(Date.CANONICAL_WEEKDAYS[i]);
  }

  Date.WEEKDAYS = list;
  Date.weekStartsOn = day;
}

Object.extend(Date.prototype, {
  clone: function() {
    return new Date(this.getFullYear(), this.getMonth(), this.getDate(),
      this.getHours(), this.getMinutes(), this.getSeconds(), this.getMilliseconds());
  },

  withoutTime: function() {
    return new Date(this.getFullYear(), this.getMonth(), this.getDate());
  },

  set: function(values) {
    for (var key in values)
      this["set" + key.charAt(0).toUpperCase() + key.substring(1)](values[key]);
    return this;
  },

  next: function(offset) {
    offset = offset === undefined ? 1 : offset;
    return this.clone().set({ date: this.getDate() + offset });
  },

  previous: function(offset) {
    offset = offset === undefined ? 1 : offset;
    return this.next(-offset);
  },

  beginningOfWeek: function() {
    var adjustment = this.getDay() - Date.weekStartsOn;
    if(adjustment < 0) adjustment += 7;
    return this.previous(adjustment);
  },

  beginningOfMonth: function() {
    return this.clone().set({ date: 1 });
  },

  getMonthName: function() {
    return Date.MONTHS[this.getMonth()];
  },

  getDayName: function() {
    return Date.WEEKDAYS[this.getDay()];
  },

  isWeekend: function() {
    return (this.getDay() == 0 || this.getDay() == 6);
  },

  equal: function(date) {
    return this.getTime() == date.getTime();
  },

  toDateString: function() {
    return [this.getFullYear(), this.getMonth() + 1,
      this.getDate()].invoke("toPaddedString", 2).join("-");
  }
});

Date.prototype.succ = Date.prototype.next;

var $D = function(date) {
  if (!date) {
    return $D(new Date());
  } else if (date.constructor == Date) {
    return date.withoutTime();
  } else if (date.constructor == Array) {
    return new Date(date[0], date[1] - 1, date[2]);
  } else if (arguments.length == 3) {
    return $D.call(null, $A(arguments));
  } else {
    return $D.call(null, date.split("-"));
  }
};

/* ------------------------------------------------------------------------
 * file_v2.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

function toggleExtended() {
  var extended = $('extended')
  if (extended.style.display == 'none') {
    extended.style.display = 'block'
  } else {
    extended.style.display = 'none'
  }
}

function togglePeople(master, className) {
  var people = document.getElementsByClassName(className);
  if (master.checked) {
    for (i = 0; i < people.length; i++) { people[i].checked = true; }
  } else {
    for (i = 0; i < people.length; i++) { people[i].checked = false; }
  }
}

function toggleMaster(checkbox, master) {
  master = $(master)
  if(!master) return
  if (master.checked && !checkbox.checked) {
    master.checked = false;
  }
}

function toggleDimClientPeople(hide_as_private) {
  hide_as_private.checked ? dimClientPeople() : litClientPeople();
}

function dimClientPeople() {
  var people = document.getElementsByClassName("clientPeople");
  for (i = 0; i < people.length; i++) {
    people[i].checked = false;
    people[i].disabled = true;
  }
}

function litClientPeople() {
  var people = document.getElementsByClassName("clientPeople");
  for (i = 0; i < people.length; i++) { people[i].disabled = false; }
}
/* ------------------------------------------------------------------------
 * layout.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var Layout = {
  swapWithScreenBody: function(element_to_swap) {
    element_to_swap = $(element_to_swap);
    var screen_body = $('screen_body');
    var from = element_to_swap.visible() ? element_to_swap : screen_body;
    var to   = element_to_swap.visible() ? screen_body : element_to_swap;

    $('swap_from').appendChild(from);
    $('swap_to').appendChild(to);

    var field_to_preselect = to.down(".sheet_autofocus");

    /*
    if (animate) {
      new Effect.Parallel([
        new Effect.DropOut(from, {sync: true}),
        new Effect.BlindDown(to, {sync: true})
      ], {
        duration: 0.5,
        afterFinish: function() {
          if (field_to_preselect)
            Field.activate.delay(0.25, field_to_preselect);
        }
      });
    } else {
    */
      from.hide();
      to.show();
      if (field_to_preselect)
        Field.activate.delay(0.25, field_to_preselect);
    /*
    }
    */
  }
}

/* ------------------------------------------------------------------------
 * login.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var Login = {
  loginWithOpenId: function(options) {
    options = options || {};
    options.duration = 0.2;
    $("login_dialog").transition(options, function() {
      $("open_id_login").show();
      $("user_name_login").hide();
    }).after(function() {
      $("identity_url").focus();
      this.clearUserNameAndPassword();
    }.bind(this));
  },

  loginWithUserName: function() {
    $("login_dialog").transition({ duration: 0.2 }, function() {
      $("user_name_login").show();
      $("open_id_login").hide();
    }).after(function() {
      $("username").focus();
      this.clearIdentityUrl();
    }.bind(this));
  },

  clearUserNameAndPassword: function() {
    $('username').value = '';
    $('password').value = '';
  },

  clearIdentityUrl: function() {
    $('identity_url').value = '';
  },

  clearHiddenFields: function() {
    if (!$("open_id_login").visible()) {
      this.clearIdentityUrl();
    } else {
      this.clearUserNameAndPassword();
    }
  }
};

document.observe("dom:loaded", function() {
  if ($(document.body).hasClassName("login") && window.location.hash == "#open_id_login")
    Login.loginWithOpenId({ animate: false });
});
var MilestoneQuickWindow = {
  close: function() {
    this.controller.close();
  },

  reset: function() {
    this.close();
    this.controller.clearPurgatory();
  }
};

document.observe("dom:loaded", function() {
  var windowElement = $("milestone_quick_window");
  if (windowElement) {
    MilestoneQuickWindow.controller = new DimZum.Controller({
      prefix: "milestones",
      shade:  { opacity: 0.15 },
      window: {
        element: windowElement,
        yOffset: 0.25
      }
    });
    new HoverObserver(windowElement);
  }
});
document.observe("calendar:dateSelected", function(event) {
  var element   = event.findElement(".calendar_date_select").previous("input");
  var original  = CalendarDate.parse(element.readAttribute("original"));
  var milestone = element.up(".Milestone");
  var shifter   = milestone ? milestone.down(".shift") : null;
  if (!shifter) return;

  if (original.equals(event.memo.date)) {
    if (shifter.visible())
      shifter.transition(function() { shifter.hide() });
  } else {
    if (!shifter.visible())
      shifter.transition(function() { shifter.show() }).
        after(function() { shifter.up(".Milestone").slideIntoView() });
  }
});
/* ------------------------------------------------------------------------
 * msg.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var msgs = {
  beforeRemoveAttachment: function(id) {
    Element.show('spin_' + id)
  },

  afterRemoveAttachment: function(id) {
    new Effect.Fade('attachment_' + id,
      {duration: 0.5,
       afterFinish: function() { Element.remove('attachment_' + id) }})
  },

  adjustTextarea: function(textarea, collapsed) {
    var lines = textarea.value.split("\n");
    var count = lines.length;
    lines.each(function(line) { count += parseInt(line.length / 70); });

    var rows = parseInt(collapsed / 20);

    if (count > rows) {
      textarea.style.height = (collapsed * 2) + 'px';
    }

    if (count <= rows) {
      textarea.style.height = collapsed + 'px';
    }
  },

  commentEditCountdown: function(comment, cutoff) {
    var diff = cutoff - new Date().getTime();
    if(isNaN(diff) || diff <= 0) {
      $(comment).down('.editable_until').hide();
    } else {
      var minutes = Math.round(diff / 60000);
      $(comment).down('.editable_minutes').update(minutes);
      setTimeout(msgs.commentEditCountdown.curry(comment, cutoff), 60000);
    }
  },

  submitter: {
    prepare: function(form) {
      if(!validateField('post_title', 'Every message must have a title')) {
        return false;
      }

      $('buttons', 'please_wait').each(Element.toggle);
      msgs.submitter.fixAction(form);
      return true;
    },

    prepareComment: function(form) {
      if(!validateField('commentBody', 'Every comment must have a body')) {
        return false;
      }
      $('buttons', 'please_wait').each(Element.toggle);
      msgs.submitter.fixAction(form);
      return true;
    },

    fixAction: function(form) {
      var needs_upload = false;
      $$('#attachment_fields input').each(function(field) {
         if (field.value.match(/^\s*$/) == null) needs_upload = true;
      })

      if (!needs_upload) form.action = form.action.replace(/\/upload\//, "/");
    },

    cancelPreview: function() {
      $('Preview').hide();
      $('post_form_container').show();
      $('preview_button').down().disabled = false;
      $('preview_button').show();
      $('edit_button').hide();
      $('post_body').focus();
    },

    submit: function(form) {
      if (msgs.submitter.prepare(form)) { form.submit(); }
    }
  },

  notifier: {
    toggle: function() {
      this.visible() ? this.hide() : this.show()
    },

    visible: function() {
      return Element.visible('NotifyBlock')
    },

    show: function() {
      visible = this.visible()

      new Effect.BlindDown('NotifyBlock', {duration: 0.2})
      Element.hide('Notify_link')
      $('notify_everyone').checked = false

      return visible
    },

    hide: function() {
      visible = this.visible()

      new Effect.BlindUp('NotifyBlock', {duration: 0.2})
      Element.show('Notify_link')

      return visible
    },

    all: function() {
      if($('notify_everyone').checked) this.hide()
    }
  },

  milestoner: {
    updateCompletionCheckboxVisibility: function() {
      if($('post_milestone_id').selectedIndex == 0) {
        $('completion_option').hide();
      } else {
        $('completion_option').show();
      }
    }
  },

  formatGuide: {
    toggle: function() {
      this.visible() ? this.hide() : this.show()
    },

    visible: function() {
      return Element.visible('formatting_guide')
    },

    show: function() {
      visible = this.visible()

      new Effect.BlindDown('formatting_guide', {duration: 0.2})
      Element.activate('formatting_guide_link', true)

      return visible
    },

    hide: function() {
      visible = this.visible()

      new Effect.BlindUp('formatting_guide', {duration: 0.2})
      Element.activate('formatting_guide_link', false)

      return visible
    }
  }
}
/* ------------------------------------------------------------------------
 * open_bar.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var OpenBar = {
  selectCurrent: function(application, name) {
    $(document.body).addClassName("with_open_bar");

    var app_id  = 'open_bar_app_' + application;
    var link_id = 'open_bar_link_' + application + '_' + name;

    if ($(app_id)) $(app_id).addClassName('on');

    if ($(link_id)) {
      $(link_id).addClassName('current_account');
      if ($(app_id)) $(app_id).innerHTML += ": " + $(link_id).innerHTML;
      $(link_id).innerHTML = "&bull; " + $(link_id).innerHTML;
    }
  }
};
var Participants = {
  setAll: function(company_id, change, confirm_message) {
    if (confirm(confirm_message)) {
      $$('.access_check_box_for_' + company_id).each(function(check_box) {
        check_box.checked = (change == 'grant' ? 'checked' : '');
      });

      $('spinning_access_for_' + company_id).show();;
      $('access_controls').submit();
    }
  },

  toggleRights: function(person_id, checkbox) {
    new_value = checkbox.checked ? "visible" : "hidden";
    $('scheduling_checkbox_' + person_id).checked = checkbox.checked;

    this.permissionRadioButtonsFor(person_id).slice(1).each(function(radio_button_name) {
      $(radio_button_name).style.visibility = new_value;
    });

    this.updateBackgroundColorsFor(person_id, "scheduling");

    this.updateRights(person_id);
  },

  updateRights: function(person_id) {
    var spinner = $('spinning_abilities_for_' + person_id);
    spinner.show();
    new Ajax.Request(
      $('access_controls').action, {
        parameters: $('access_controls').serialize(),
        onComplete: function() { spinner.hide(); }
      });
  },

  permissionRadioButtonsFor: function(person_id) {
    return ['scheduling_checkbox_', 'communication_', 'prioritizing_', 'scheduling_'].map(function(element) {
      return element + person_id;
    });
  },

  updateAbilitiesFor: function(person_id) {
    this.updateBackgroundColorsFor(person_id);
    this.updateRights(person_id);
  },

  updateBackgroundColorsFor: function(person_id) {
    var radio_button_names = this.permissionRadioButtonsFor(person_id);
    var selected_radio_button_name = radio_button_names.slice(1).detect(function(radio_button_name) {
      return $(radio_button_name).getElementsByTagName('input')[0].checked;
    });


    var current_radio_button_position = radio_button_names.indexOf(selected_radio_button_name);

    var results = radio_button_names.partition(function(radio_button_name) {
      return current_radio_button_position  >= radio_button_names.indexOf(radio_button_name);
    });
    var included = results.first(), excluded = results.last();

    included.each(function(radio_button_name) {
      $(radio_button_name).removeClassName('disabled');
    });

    excluded.each(function(radio_button_name) {
      $(radio_button_name).addClassName('disabled');
    });
  }
}
/* ------------------------------------------------------------------------
 * pending_attachments.js
 * Copyright (c) 2004-2008 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var PendingAttachments = {
  add: function(file_selector, id) {
    var offscreen = $(id).down("p.offscreen"), template = $(id).down("p.template");
    var templateHTML = template.innerHTML;

    if (template.down('input').name.match(/^\w+\[\d\]\[\w+\]$/)) {
      var last_key = (offscreen.lastChild) ? Number(offscreen.lastChild.name.match(/(\d)/).last()) : 0;
      file_selector.name = file_selector.name.sub(/\d/, last_key + 1);
    }

    this.updatePendingAttachments(id);
    offscreen.appendChild(file_selector);
    template.innerHTML = templateHTML;
  },

  remove: function(path, id) {
    this.removeFileSelector(path, id);
    this.updatePendingAttachments(id);
  },

  hasPendingAttachments: function(id) {
    if ($(id).down('.pending_attachments')) {
      var pending_attachments = $(id).down('.pending_attachments').down();
      return pending_attachments && pending_attachments.down();
    } else {
      return false;
    }
  },

  hasExistingAttachments: function(id) {
    if ($(id).getElementsBySelector('.attachments li')) {
      var existing_attachments = $(id).getElementsBySelector('.attachments li');
      return existing_attachments.detect(function(item) { return item.visible(); });
    } else {
      return false;
    }
  },

  findFileSelector: function(path, id) {
    return $(id).select('input.file_selectors').select(function(file_selector) { return file_selector.value == decodeURIComponent(path); }).first();
  },

  removeFileSelector: function(path, id) {
    this.findFileSelector(path, id).remove();
  },

  updatePendingAttachments: function(id) {
    new Ajax.Request('/pending_attachments', { parameters: this.pendingFilesAsParameters(id) + "&id=" + id });
  },

  pendingFilesAsParameters: function(id) {
    return $(id).getElementsBySelector('input.file_selectors').select(function(file_selector) {
      return file_selector.value != "";
    }).collect(function(file_selector) {
      return "files[]=" + encodeURIComponent(file_selector.value);
    }).join("&");
  }
}
/* ------------------------------------------------------------------------
 * contacts.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

People = {
  toggleAccessibleCompanyProjects: function(company_id, checked) {
    if (checked) {
      $$('.accessible_projects_for_' + company_id).each(function(box) { box.checked = 'checked' });
    } else {
      $$('.accessible_projects_for_' + company_id).each(function(box) { box.checked = '' });
    }
  },

  checkAllAccessibleProjects: function() {
    $$('.accessible_projects').each(function(box) { box.checked = 'checked' });
  },

  uncheckAllAccessibleProjects: function() {
    $$('.accessible_projects').each(function(box) { box.checked = '' });
  },


  switchToOpenId: function() {
    this.showOpenId();
    $('open_id_verification_notice').show();
    this.clearAuthenticationFields();
  },

  showOpenId: function() {
    $('open_id').show();
    $('user_name_and_password').hide();
    $('person_identity_url').focus();
  },

  switchToUserNameAndPassword: function() {
    this.showUserNameAndPassword();
    $('open_id_verification_notice').hide();
    this.clearAuthenticationFields();
  },

  showUserNameAndPassword: function() {
    $('user_name_and_password').show();
    $('open_id').hide();
    $('person_user_name').focus();
  },

  clearAuthenticationFields: function() {
    this.clearIdentityUrl();
    this.clearUserNameAndPassword();
  },

  clearIdentityUrl: function() {
    $('person_identity_url').clear();
  },

  clearUserNameAndPassword: function() {
    $('person_user_name').clear();
    $('person_password').clear();
  },

  clearHiddenAuthenticationFields: function() {
    if ($('open_id').style.display == "none") {
      this.clearIdentityUrl();
    } else {
      this.clearUserNameAndPassword();
    }
  }
}
Search = {
  setScope: function(scope, search_terms) {
    $('scope').value = scope;
    $('scope').form.submit();
  }
}

/* ------------------------------------------------------------------------
 * settings.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var settings = {
  padLogo: {
    before: function() {
      $('pad_logo', 'pad_logo_spinner').each(Element.toggle)
    },

    success: function(request) {
      $('pad_logo', 'pad_logo_spinner').each(Element.toggle)
      if($('pad_logo').checked)
        Element.addClassName("LogoBox", "white")
      else
        Element.removeClassName("LogoBox", "white")
    },

    failure: function(request) {
      $('pad_logo', 'pad_logo_spinner').each(Element.toggle)
      $('pad_logo').checked = !$('pad_logo').checked
      alert("Your request could not be completed. Please try again.")
    }
  }
}
/* ------------------------------------------------------------------------
 * templates.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

function isNotifiable(me,value) {
  return value != me && /^\d+$/.test(value)
}

function setNotifyVisible(list,me,id) {
  text = $( "item_" + id + "_content" )

  if( !list ) {
    list = $( "responsible_parties_" + id )
  }

  selected = list.options[list.selectedIndex].value
  selected_is_valid = isNotifiable( me, selected )

  original_is_valid = false

  if( text ) {
    original = list.options[eval("original_"+id)].value
    original_is_valid = isNotifiable( me, original )
  }

  visible = original_is_valid ? ( original != selected && selected_is_valid ) : selected_is_valid

  if( selected_is_valid && !visible ) {
    visible = ( text ? ( text.defaultValue != text.value ) : false )
  }

  if( text ) visible = visible && !/^\s*$/.test(text.value)

  span = $( "notify_" + id )
  if( span ) {
    span.style.display = ( visible ? "inline" : "none" )
  }

  delete_span = $( "delete_" + id )
  if( delete_span ) {
    delete_span.style.display = ( visible ? "none" : "inline" )
  }
}

function createResponseReport(response, url, options) {
  options = options || {};

  var popup = document.createElement('div');
  popup.setAttribute('id', 'popup-div');
  popup.style.position = "absolute";
  popup.style.zIndex = 999;
  popup.style.border = "5px solid #f77";
  popup.style.background = "#fee";
  popup.style.left = "10%";
  popup.style.width = "80%";
  popup.style.top = "20px";

  var body = document.createElement('div');
  var controls = document.createElement('div');

  popup.appendChild(body);
  popup.appendChild(controls);

  body.style.padding = "10px";
  body.style.textAlign = "left";

  controls.style.borderTop = "1px solid #f77";
  controls.style.padding = "10px";
  controls.style.textAlign = "right";
  controls.style.fontSize = "10px";
  popup.style.background = "#fdd";

  controls.innerHTML = "<a href='#' onclick=\"$('popup-div').remove()\">Close</a>";

  body.innerHTML = "<p>Please copy and send the following text to <a href='mailto:support@basecamphq.com'>support@basecamphq.com</a>, to help debug this problem. Please also include information about how to duplicate this error.</p>\n" +
    "<form onsubmit='return false'><textarea name='ignore' style='width: 100%' rows='25'>" +
    "URL: " + url + "\n" +
    "Status: " + response.status + " " + response.statusText + "\n" +
    navigator.userAgent + "\n\n------\n" +
    response.getAllResponseHeaders() + "\n-----\n" +
    response.responseText +
    "</textarea></form>"

  document.body.appendChild(popup);
}

/* =============================== */
/* = General Hover-related tasks = */
/* =============================== */

var Hover = {
  EXIT_DELAY  : 600,
  HOVER_BG_ON : 'url(/images/hover-gradient.gif) left repeat-y',
  HOVER_BG_OFF: 'none',

  lastTimer   : null,
  lastCommand : null,
  inhibit     : false,

  clearCurrent: function() {
    if(!this.lastTimer) return
    clearTimeout(this.lastTimer)
    eval(this.lastCommand)
    this.lastTimer = this.lastCommand = null
  },

  endWith: function(command) {
    if(this.inhibit) return
    this.lastCommand = command
    this.lastTimer = setTimeout(command, this.EXIT_DELAY)
  },

  toggle: function(on, container, nubbin) {
    if(this.inhibit) return

    if(on) {
      if($(container))
        $(container).style.background = this.HOVER_BG_ON
      Element.showIf(nubbin)
    } else {
      if($(container))
        $(container).style.background = this.HOVER_BG_OFF
      Element.hideIf(nubbin)
    }
  }
}

/* ====================================================== */
/* = Tasks relating to whole lists, or lists in general = */
/* ====================================================== */

var lists = {
  hover: {
    begin: function(id) {
      Hover.clearCurrent()
      Hover.toggle(true, 'list_head_' + id, 'nubbin_list_' + id)
    },

    end: function(id, delay) {
      if(delay)
        Hover.endWith('lists.hover.end(' + id + ')')
      else
        Hover.toggle(false, 'list_head_' + id, 'nubbin_list_' + id)
    }
  },

  editor: {
    toggle: function(id) {
      var div = $('edit_list_' + id + '_title')
      if(!div.populated) {
        Element.show('list_spinner_' + id)
        new Ajax.Updater({success: div}, todos.list_edit_url,
          {asynchronous:true, parameters:'id=' + id,
           onComplete:function(request) {
             Element.hide('list_spinner_' + id)
             if(request.status == 200) {
               div.populated = true
               lists.editor.toggle(id)
             } else {
               alert(todos.ERROR_MSG)
             }
           }})
      } else {
        lists.hover.end(id, false)
        $(div, 'list_head_' + id, 'list_body_' + id).each(Element.toggle)
        Hover.inhibit = Element.visible(div)
      }
    },

    active: function(id) {
      return Element.visible('edit_list_' + id + '_title')
    }
  },

  save: {
    before: function(id) {
      Element.show("update_list_" + id)
    },

    failure: function(request, id) {
      Element.hide("update_list_" + id)
      alert(todos.ERROR_MSG)
    }
  },

  deleter: {
    before: function(id) {
      Element.show('list_spinner_' + id)
    },

    failure: function(request, id) {
      Element.hide('list_spinner_' + id)
      alert(todos.ERROR_MSG)
    }
  },

  reorder: {
    toggle: function() {
      var link = $('lists_reorder_link')
      Element.activate(link, !link['bc:active'])
      if(link['bc:active']) {
        Hover.clearCurrent()
        this.makeDraggableLists()
        Element.hide('new_list_link')
        Element.hide('new_reorder_separator')
      } else {
        Element.show('new_list_link')
        this.setSeparatorVisibility()
      }
      Hover.inhibit = link['bc:active']

      $$('#lists div.list').each(function(list) {
        var id = todos.idOf(list)
        Element.toggle('list_body_' + id)
        if($('drag_list_' + id)) Element.toggle('drag_list_' + id)
        /* hide the privatebug while reordering, so that reordering private lists works in IE */
        if($('privatebug_' + id)) Element.toggle('privatebug_' + id)
        if($('list_desc_' + id)) Element.toggle($('list_desc_' + id))
        if($('list_controls_' + id)) Element.toggle($('list_controls_' + id))
        if(lists.editor.active(id)) lists.editor.toggle(id)
      })
    },

    makeDraggableLists: function(id) {
      Sortable.create($('lists'), {tag: 'div'})
      todos.installDragObserver()
    },

    setSeparatorVisibility: function() {
      if(todos.uncompletedListsCount() < 2)
        Element.hideIf('new_reorder_separator')
      else
        Element.showIf('new_reorder_separator')
    },

    setLinkVisibility: function() {
      if(todos.uncompletedListsCount() < 2)
        Element.hideIf('lists_reorder_link')
      else
        Element.showIf('lists_reorder_link')
    }
  },

  creator: {
    toggle: function() {
      var link = $('new_list_link')
      Element.activate(link, !link['bc:active'])
      if(link['bc:active']) {
        $('new_list_name').value = ""
        $('description').value = ""
        if($('template_id')) $('template_id').selectedIndex = 0
        Element.hideIf('lists_reorder_link', 'new_reorder_separator')
        if(this.templateListVisible()) this.toggleTitleOrTemplate()
        Element.hideIf('blankslate')
        new Effect.BlindDown('new_list', {duration: 0.2,
          afterFinish: function() { Field.focus('new_list_name') }})
      } else {
        new Effect.BlindUp('new_list', {duration: 0.2})
        lists.reorder.setLinkVisibility()
        lists.reorder.setSeparatorVisibility()
        if(todos.uncompletedListsCount() < 1)
          Element.showIf('blankslate')
      }
    },

    templateListVisible: function() {
      return $('template_id') && $('template_id').style.display != "none"
    },

    toggleTitleOrTemplate: function() {
      var span = $('title_or_template')

      if(span.style.display == "none") {
        $(span, 'new_list_name', 'new_list_description').each(Element.show)
        $('template_or_title', 'template_id').each(Element.hide)
        $('use_template').value = "0"
      } else {
        $(span, 'new_list_name', 'new_list_description').each(Element.hide)
        $('template_or_title', 'template_id').each(Element.show)
        $('use_template').value = "1"
      }

      $('new_list').style.height = ""
      $('new_list').style.paddingBottom = "10px"
    },

    validate: function() {
      var use_template = $('use_template')
      if(use_template && use_template.value == "1") {
        if($('template_id').selectedIndex == 0) {
          alert('You must select a template first.')
          return false
        }
      } else {
        if(!Field.present('new_list_name')) {
          alert('You must enter a name for the list.')
          return false
        }
      }
      return true
    },

    before: function() {
      Element.show('new_list_spinner')
    },

    failure: function(request, url) {
      Element.hide('new_list_spinner')
      if(!confirm(todos.ERROR_MSG + "\n\nFor more information, click \"Cancel\".")) {
        createResponseReport(request, url);
      }
    }
  }
}

/* ============================================ */
/* = Tasks relating to individual to-do items = */
/* ============================================ */

var todos = {
  ERROR_MSG: "There was an error processing this request.\n" +
             "Please wait a minute and try again.",

  hover: {
    begin: function(id) {
      Hover.clearCurrent()
      Hover.toggle(true, 'show_item_' + id, 'nubbin_item_' + id)
    },

    end: function(id, delay) {
      if(delay)
        Hover.endWith('todos.hover.end(' + id + ')')
      else
        Hover.toggle(false, 'show_item_' + id, 'nubbin_item_' + id)
    }
  },

  reorder: {
    toggle: function(id) {
      if($('completed_items_' + id)) Element.toggle('completed_items_' + id)

      var link = $('reorder_list_' + id + '_link')
      Element.activate(link, !link['bc:active'])
      if(link['bc:active']) {
        todos.makeDraggable(id)
        lists.hover.end(id, false)
      }
      Hover.inhibit = link['bc:active']

      todos.childrenOf('uncompleted_items_list_' + id, 'li', function(item) {
        var id = todos.idOf(item)
        Element.toggle('check_box_for_item_' + id)
        if($('drag_' + id)) Element.toggle('drag_' + id)
      })

      todos.toggleAddItemLink(id)
    }
  },

  completer: {
    set: function(id, list) {
      Element.show('ucspin_' + id) // spinner
      new Ajax.Request(todos.item_complete_url,
        {asynchronous:true, evalScripts:true, parameters:'id=' + id,
        onFailure:function(request) { todos.completer.setFailed(request, id) }})
    },

    setFailed: function(request, id) {
      Element.hide('ucspin_' + id)
      $('item_cb_' + id).checked = false
      alert(todos.ERROR_MSG)
    },

    unset: function(id, list) {
      Element.show('cspin_' + id) // spinner
      new Ajax.Request(todos.item_uncomplete_url,
        {asynchronous:true, evalScripts:true, parameters:'id=' + id,
        onFailure:function(request) { todos.completer.unsetFailed(request, id) }})
    },

    unsetFailed: function(request, id) {
      Element.hide('cspin_' + id)
      $('citem_cb_' + id).checked = true
      alert(todos.ERROR_MSG)
    }
  },

  toggleTime: function(id) {
    var time_div = $('time_' + id)
    var content_div = $('ucontent_' + id) || $('ccontent_' + id)
    if(time_div) {
      $(content_div, time_div).each(Element.toggle)
    } else {
      Element.showIf('cspin_' + id, 'ucspin_' + id)
      new Ajax.Updater({success: content_div}, this.item_time_url,
        {asynchronous:true, parameters:'id=' + id,
         insertion:Insertion.After, onComplete:function(request) {
           Element.hideIf('cspin_' + id, 'ucspin_' + id)
           if(request.status == 200) {
             Element.hide(content_div)
           } else {
             alert(todos.ERROR_MSG)
           }
         }})
    }
  },

  toggleAddItemLink: function(id) {
    if($('add_item_' + id)) Element.toggle('add_item_' + id)
  },

  toggleEditItem: function(id) {
    var div = $('edit_item_' + id)
    if(!div.populated) {
      Element.show('ucspin_' + id)
      new Ajax.Updater({success: div}, this.item_edit_url,
        {asynchronous:true, parameters:'id=' + id,
         onComplete:function(request) {
           Element.hide('ucspin_' + id)
           if(request.status == 200) {
             div.populated = true
             todos.toggleEditItem(id)
           } else {
             alert(todos.ERROR_MSG)
           }
         }})
    } else {
      $('show_item_' + id, 'edit_item_' + id).each(Element.toggle)
    }
  },

  toggleAddItem: function(id) {
    $('new_content_' + id).value = ""
    $('add_item_to_list_' + id, 'add_item_' + id + '_link').each(Element.toggle)
    if($('add_item_to_list_' + id).style.display != "none") Field.focus('new_content_' + id)
  },

  onAddItem: function(id) {
    Element.hide('add_item_button_' + id)
    Element.show('add_item_spinner_' + id) // spinner
  },

  onAddedItemFailed: function(request, id) {
    Element.hide('add_item_spinner_' + id)
    Element.show('add_item_button_' + id)
    alert(todos.ERROR_MSG)
  },

  onDeleteItem: function(id, list, want_confirm) {
    var allow = !want_confirm ||
      confirm('Are you sure you want to delete this to-do item?\n\n' +
              'Note: There is no undo.')

    if(allow) {
      Element.showIf('ucspin_' + id, 'cspin_' + id)
      new Ajax.Request(this.item_delete_url, {asynchronous:true,
        evalScripts:true, parameters:'id=' + id,
        onFailure:function(request) {
          Element.hideIf('ucspin_' + id, 'cspin_' + id)
          alert(todos.ERROR_MSG)
        }})
    }
  },

  onEditItem: function(id, list, form) {
    if(Field.present('item_content_' + id)) {
      Element.show('saving_item_' + id)
      new Ajax.Request(this.item_update_url, {asynchronous:true,
         evalScripts:true, parameters:Form.serialize(form) + '&id=' + id,
         onFailure:function(request) {
           Element.hide('saving_item_' + id)
           alert(todos.ERROR_MSG)
         }})
    }
  },

  onItemTimeUpdate: function(id) {
    if(!Field.present('entry_hours_' + id)) {
      alert("You must specify the number of hours spent on this task.")
      Field.focus('entry_hours_' + id)
      return false
    }

    Element.show('time_spinner_' + id)
    return true
  },

  onItemTimeUpdated: function(request, id) {
    var item = $('uncompleted_' + id) || $('completed_item_' + id)
    if(request.status != 200) {
      Element.hide('time_spinner_' + id)
      alert("The time entry could not be recorded.")
    } else {
      item.innerHTML = request.responseText
      new Effect.Highlight(item)
    }
  },

  setListControlVisibility: function(id) {
    if(this.accessibleUncompletedCount(id) < 1)
      Element.hide('list_controls_' + id)
    else
      Element.show('list_controls_' + id)
  },

  setReorderLinkVisibility: function(id) {
    if(this.uncompletedCount(id) < 2)
      Element.hideIf('reorder_list_' + id + '_link')
    else
      Element.showIf('reorder_list_' + id + '_link')
    this.setListControlVisibility(id)
  },

  makeDraggable: function(id) {
    Sortable.create($('uncompleted_items_list_' + id),
      {handle: 'di_' + id})
    this.installDragObserver()
  },

  installDragObserver: function() {
    if(!this.observer_installed) {
      this.observer_installed = true
      Draggables.addObserver({
        onStart: function(name, draggable, event) {},
        onEnd: function(name, draggable, event) {
          var element = draggable.element;
          var siblings = todos.siblingsOf(element);
          var position = siblings.indexOf(element) + 1;

          var parms = "id=" + todos.idOf(element) + "&to=" + position +
            "&only_active=1"

          new Ajax.Request(
            element.tagName == "LI" ?
              todos.item_reorder_url :
              todos.list_reorder_url,
            { parameters: parms, asynchronous: true })
        }
      })
    }
  },

  idOf: function(element) {
    return element ? element.id.split("_")[1] : ""
  },

  siblingsOf: function(element) {
    return $A(element.parentNode.childNodes).select(function(sibling) {
      return sibling.tagName == element.tagName;
    })
  },

  accessibleUncompletedCount: function(id) {
    var count = 0
    this.childrenOf('uncompleted_items_list_' + id, 'li', function(item) {
      var id = todos.idOf(item)
      if($('drag_' + id)) count += 1
    })
    return count
  },

  uncompletedCount: function(id) {
    return this.childrenOf('uncompleted_items_list_' + id, 'li').length
  },

  uncompletedListsCount: function() {
    return this.childrenOf('lists', 'div').length
  },

  reordering: function(id) {
    return $('reorder_list_' + id + '_link').innerHTML != "Reorder"
  },

  childrenOf: function(element, tag, callback) {
    var nodes = $(element).childNodes
    var result

    if(!callback) result = new Array()
    tag = tag.toUpperCase()
    for(var i = 0; i < nodes.length; i++)
      if(nodes[i].tagName && nodes[i].tagName == tag) {
        if(callback) callback(nodes[i])
        else result.push(nodes[i])
      }

    if(!callback) return result
  },

  zzz_placeholder: false // so we don't have to remember to add a comma
}
/* ------------------------------------------------------------------------
 * time.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var TimeHandler = {
  HIGHLIGHT_CLASS: "donelink",
  CANCEL_REPORT_CREATION: "Cancel report creation",

  submit: function() {
    if(TimeHandler.action.before) eval(TimeHandler.action.before);

    new Ajax.Request(TimeHandler.action.url,
      { asynchronous: true,
        evalScripts:  true,
        method:       TimeHandler.action.method,
        parameters:   Form.serialize('entry_adder')});

    return false;
  },

  toggleReport: function() {
    var link = $('report_link')
    $('inner_page_header').transition(function() {
      if(link.className.indexOf(this.HIGHLIGHT_CLASS) < 0) {
        this.original_text = link.innerHTML
        this.original_class = link.className
        link.innerHTML = this.CANCEL_REPORT_CREATION
        link.className += " " + this.HIGHLIGHT_CLASS
        $('original_title').hide();
        $('new_time_report').show();
      } else {
        $('original_title').show();
        $('new_time_report').hide();
        link.innerHTML = TimeHandler.original_text
        link.className = TimeHandler.original_class
      }
    }.bind(this));
  },

  updateTotals: function(by) {
    this.updateField('hours_subtotal', by);
    this.updateField('hours_total', by);
  },

  updateField: function(field, by) {
    field = $(field);
    if(field) {
      var amount = parseFloat(field.innerHTML) + by;
      field.innerHTML = amount.toFixed(2);
    }
  },

  checkBlankSlate: function() {
    if(this.isBlank()) {
      $('total').hide();
      if($('report_link_block')) Element.hide('report_link_block');
      if($('blank_slate')) {
        $('blank_slate').show();
      }
    } else {
      $('total').show();
      if($('report_link_block')) Element.show('report_link_block')
      if($('blank_slate')) {
        $('blank_slate').hide();
      }
    }
  },

  isBlank: function() {
    return $$("#entries tr.entry").length == 0;
  },

  disableForm: function() {
    if($('new_time_entry')) {
      Form.disable('new_time_entry');
    }
  },

  enableForm: function() {
    if($('new_time_entry')) {
      Form.enable('new_time_entry');
    }
  }
}
/* ------------------------------------------------------------------------
 * todos.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

Widget.beforeDragRequestHandlers.push(function(widget, widgetParent) {
  if (widgetParent.id == "widgets") return true;

  var listIsTimeTracked = !!widgetParent.up("div.list.list_with_time_tracking");
  var itemIsTimeTracked = !!widget.down("div.item.item_with_time_tracking");

  if (listIsTimeTracked != itemIsTimeTracked) {
    if (!listIsTimeTracked) {
      widgetParent.up("div.items_wrapper").addClassName("busy");
    } else {
      widget.addClassName("busy");
    }
  }

  return true;
});

Widget.beforeDragRequestHandlers.push(function(widget, widgetParent) {
  if (widgetParent.id == "widgets") return true;
  var listId = widgetParent.up("div.list_wrapper").id, match;

  widget.descendants().concat(widget).each(function(element) {
    if (match = (element.id || "").match(/^(.*)list_\d+(.+)/)) {
      element.id = match[1] + listId + match[2];
    }
  });

  return true;
});

function setNotifyVisible(notify, value, me, current) {
  var notifiable = value != me && value.match(/^\d+$/);
  $(notify)[notifiable ? "show" : "hide"]();
}

Position.includeScrollOffsets = true;

var TodoLists = {
  resetNewListForm: function() {
    $('new_list_form').reset();
    $('use_title_block').show();
    $('use_template_block').hide();
    $('link_to_use_template').show();
    $('link_to_enter_title').hide();
  }
}

var TodoItems = {
  complete: function(id, url) {
    $('item_' + id + '_notice').show();
    $('item_submission').action = url;
    $('item_submission').submit();
  }
}
/* ------------------------------------------------------------------------
 * writeboards.js
 * Copyright (c) 2004-2007 37signals, LLC. All rights reserved.
 * ------------------------------------------------------------------------ */

var writeboards = {
  login: function(url, password) {
    $('login_form').action = url
    $('login_password').value = password
    $('login_form').submit()
  },

  checkEmpty: function() {
    var count = $('writeboards').getElementsByTagName('LI').length
    if(count < 1) Element.show('blank_slate')
  },

  showQuotaBlock: function() {
    Element.hide('creation_links')
    Element.showIf('limit_reached')
  },

  hideQuotaBlock: function() {
    Element.show('creation_links')
    Element.hideIf('limit_reached')
  },

  creator: {
    toggle: function() {
      this.visible() ? this.hide(true) : this.show(true)
    },

    show: function(animate) {
      visible = this.visible()

      /* don't animate the showing of this block if the importer is visible */
      if (!writeboards.importer.hide(false)) {
        new Effect.BlindDown('new_writeboard', {
          duration: 0.2, afterFinish: function() { Field.focus('writeboard_title') }
        })
      } else {
        Element.show('new_writeboard')
        Field.focus('writeboard_title')
      }

      Element.activate('create_writeboard_link', true)
      Element.hide('blank_slate')



      return visible
    },

    hide: function(animate) {
      visible = this.visible()

      animate ?
        new Effect.BlindUp('new_writeboard', {duration: 0.2,
          afterFinish: function() { writeboards.checkEmpty() }}) :
        Element.hide('new_writeboard')

      Element.activate('create_writeboard_link', false)

      return visible
    },

    visible: function() {
      return $('new_writeboard').style.display != "none"
    },

    before: function() {
      Element.show('writeboard_new_spinner')
    },

    success: function(request) {
      var url = request.getResponseHeader('X-Login-Url')
      var password = request.getResponseHeader('X-Login-Password')
      writeboards.login(url, password)
    },

    failure: function(request) {
      Element.hide('writeboard_new_spinner')
      if(request.responseText.match(/limit exceeded/)) {
        alert("You must upgrade before adding more writeboards.")
      } else {
        alert("Your request could not be completed. Please try again.")
      }
    }
  },

  importer: {
    toggle: function() {
      this.visible() ? this.hide(true) : this.show(true)
    },

    show: function(animate) {
      visible = this.visible()

      /* don't animate the showing of this block of the creator is visible */
      if (!writeboards.creator.hide(false)) {
        new Effect.BlindDown('importWriteboardBlock', {
          duration: 0.2, afterFinish: function() { Field.focus('import_url') }
        })
      } else {
        Element.show('importWriteboardBlock')
        Field.focus('import_url')
      }



      Element.activate('import_writeboard_link', true)
      Element.hide('blank_slate')

      return visible
    },

    hide: function(animate) {
      visible = this.visible()

      animate ?
        new Effect.BlindUp('importWriteboardBlock', {duration: 0.2,
          afterFinish: function() { writeboards.checkEmpty() }}) :
        Element.hide('importWriteboardBlock')

      Element.activate('import_writeboard_link', false)

      return visible
    },

    visible: function() {
      return $('importWriteboardBlock').style.display != "none"
    },

    before: function() {
      Element.show('writeboard_import_spinner')
    },

    success: function(request) {
      $('writeboard_import_spinner', 'blank_slate').each(Element.hide)
      this.hide()

      var position = request.getResponseHeader("X-Writeboard-Position")
      var id = request.getResponseHeader("X-Writeboard-Id")
      var quota = request.getResponseHeader("X-Quota-Status")

      if(quota == "stop") writeboards.showQuotaBlock()

      if(position == "bottom")
        new Insertion.Bottom('writeboards', request.responseText)
      else
        new Insertion.Before('writeboard_' + position, request.responseText)

      new Effect.Highlight('writeboard_' + id)
    },

    failure: function(request) {
      Element.hide('writeboard_import_spinner')
      alert("There was an error processing your request. Please try again.")
    },

    notFound: function(request) {
      Element.hide('writeboard_import_spinner')
      alert("The requested Writeboard could not be found.\n\n" +
        "Please double-check the URL and password and try again.")
    }
  },

  remove: {
    toggle: function(id) {
      this.visible(id) ? this.hide(id) : this.show(id)
    },

    show: function(id) {
      $('privacy_' + id, 'show_' + id).each(Element.hide)
      new Effect.BlindDown('remove_' + id, {duration: 0.2})
    },

    hide: function(id) {
      new Effect.BlindUp('remove_' + id, {duration: 0.2,
        afterFinish: function() {
          Element.show('show_' + id) }})
    },

    visible: function(id) {
      return $('remove_' + id).style.display != "none"
    },

    before: function(id) {
      Element.show("remove_spinner_" + id)
    },

    failure: function(request, id) {
      Element.hide("remove_spinner_" + id)
      alert("An error prevented the writeboard being deleted. Please try again.")
    },

    success: function(request, id) {
      new Effect.Fade("writeboard_" + id, {
        afterFinish: function() {
          Element.remove("writeboard_" + id)
          writeboards.hideQuotaBlock()
          writeboards.checkEmpty() }})
    }
  },

  privacy: {
    toggle: function(id) {
      this.visible(id) ? this.hide(id) : this.show(id)
    },

    show: function(id) {
      Element.hideIf('remove_' + id, 'show_' + id)
      new Effect.BlindDown('privacy_' + id, {duration: 0.2})
    },

    hide: function(id) {
      new Effect.BlindUp('privacy_' + id, {duration: 0.2,
        afterFinish: function() {
          Element.show('show_' + id) }})
    },

    visible: function(id) {
      return $('privacy_' + id).style.display != "none"
    },

    before: function(id) {
      Element.show("privacy_spinner_" + id)
      Element.hide("public_" + id)
    },

    failure: function(request, id) {
      Element.hide("privacy_spinner_" + id)
      Element.show("public_" + id)
      $('public_' + id).checked = !$('public_' + id).checked
      alert("An error prevented your request from completing. Please try again.")
    },

    success: function(request, id) {
      $('writeboard_' + id).innerHTML = request.responseText
      new Effect.Highlight('writeboard_' + id)
    }
  }
}