var Prototype={
Version:'1.5.0',
BrowserFeatures:{
XPath:!!document.evaluate
},
ScriptFragment:'(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
emptyFunction:function(){},
K:function(x){return x}
}
var Class={
create:function(){
return function(){
this.initialize.apply(this,arguments);
}
}
}
var Abstract=new Object();
Object.extend=function(destination,source){
for(var property in source){
destination[property]=source[property];
}
return destination;
}
Object.extend(Object,{
inspect:function(object){
try{
if(object===undefined)return'undefined';
if(object===null)return'null';
return object.inspect?object.inspect():object.toString();
}catch(e){
if(e instanceof RangeError)return'...';
throw e;
}
},
keys:function(object){
var keys=[];
for(var property in object)
keys.push(property);
return keys;
},
values:function(object){
var values=[];
for(var property in object)
values.push(object[property]);
return values;
},
clone:function(object){
return Object.extend({},object);
}
});
Function.prototype.bind=function(){
var __method=this,args=$A(arguments),object=args.shift();
return function(){
return __method.apply(object,args.concat($A(arguments)));
}
}
Function.prototype.bindAsEventListener=function(object){
var __method=this,args=$A(arguments),object=args.shift();
return function(event){
return __method.apply(object,[(event||window.event)].concat(args).concat($A(arguments)));
}
}
Object.extend(Number.prototype,{
toColorPart:function(){
var digits=this.toString(16);
if(this<16)return'0'+digits;
return digits;
},
succ:function(){
return this+1;
},
times:function(iterator){
$R(0,this,true).each(iterator);
return this;
}
});
var Try={
these:function(){
var returnValue;
for(var i=0,length=arguments.length;i<length;i++){
var lambda=arguments[i];
try{
returnValue=lambda();
break;
}catch(e){}
}
return returnValue;
}
}
var PeriodicalExecuter=Class.create();
PeriodicalExecuter.prototype={
initialize:function(callback,frequency){
this.callback=callback;
this.frequency=frequency;
this.currentlyExecuting=false;
this.registerCallback();
},
registerCallback:function(){
this.timer=setInterval(this.onTimerEvent.bind(this),this.frequency*1000);
},
stop:function(){
if(!this.timer)return;
clearInterval(this.timer);
this.timer=null;
},
onTimerEvent:function(){
if(!this.currentlyExecuting){
try{
this.currentlyExecuting=true;
this.callback(this);
}finally{
this.currentlyExecuting=false;
}
}
}
}
String.interpret=function(value){
return value==null?'':String(value);
}
Object.extend(String.prototype,{
gsub:function(pattern,replacement){
var result='',source=this,match;
replacement=arguments.callee.prepareReplacement(replacement);
while(source.length>0){
if(match=source.match(pattern)){
result+=source.slice(0,match.index);
result+=String.interpret(replacement(match));
source=source.slice(match.index+match[0].length);
}else{
result+=source,source='';
}
}
return result;
},
sub:function(pattern,replacement,count){
replacement=this.gsub.prepareReplacement(replacement);
count=count===undefined?1:count;
return this.gsub(pattern,function(match){
if(--count<0)return match[0];
return replacement(match);
});
},
scan:function(pattern,iterator){
this.gsub(pattern,iterator);
return this;
},
truncate:function(length,truncation){
length=length||30;
truncation=truncation===undefined?'...':truncation;
return this.length>length?
this.slice(0,length-truncation.length)+truncation:this;
},
strip:function(){
return this.replace(/^\s+/,'').replace(/\s+$/,'');
},
stripTags:function(){
return this.replace(/<\/?[^>]+>/gi,'');
},
stripScripts:function(){
return this.replace(new RegExp(Prototype.ScriptFragment,'img'),'');
},
extractScripts:function(){
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];
});
},
evalScripts:function(){
return this.extractScripts().map(function(script){return eval(script)});
},
escapeHTML:function(){
var div=document.createElement('div');
var text=document.createTextNode(this);
div.appendChild(text);
return div.innerHTML;
},
unescapeHTML:function(){
var div=document.createElement('div');
div.innerHTML=this.stripTags();
return div.childNodes[0]?(div.childNodes.length>1?
$A(div.childNodes).inject('',function(memo,node){return memo+node.nodeValue}):
div.childNodes[0].nodeValue):'';
},
toQueryParams:function(separator){
var match=this.strip().match(/([^?#]*)(#.*)?$/);
if(!match)return{};
return match[1].split(separator||'&').inject({},function(hash,pair){
if((pair=pair.split('='))[0]){
var name=decodeURIComponent(pair[0]);
var value=pair[1]?decodeURIComponent(pair[1]):undefined;
if(hash[name]!==undefined){
if(hash[name].constructor!=Array)
hash[name]=[hash[name]];
if(value)hash[name].push(value);
}
else hash[name]=value;
}
return hash;
});
},
toArray:function(){
return this.split('');
},
succ:function(){
return this.slice(0,this.length-1)+
String.fromCharCode(this.charCodeAt(this.length-1)+1);
},
camelize:function(){
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;
},
capitalize:function(){
return this.charAt(0).toUpperCase()+this.substring(1).toLowerCase();
},
underscore:function(){
return this.gsub(/::/,'/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
},
dasherize:function(){
return this.gsub(/_/,'-');
},
inspect:function(useDoubleQuotes){
var escapedString=this.replace(/\\/g,'\\\\');
if(useDoubleQuotes)
return'"'+escapedString.replace(/"/g,'\\"')+'"';
else
return"'"+escapedString.replace(/'/g,'\\\'') + "'";
  }
});

String.prototype.gsub.prepareReplacement = function(replacement) {
  if (typeof replacement == 'function') return replacement;
  var template = new Template(replacement);
  return function(match) { return template.evaluate(match) };
}

String.prototype.parseQuery = String.prototype.toQueryParams;

var Template = Class.create();
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
Template.prototype = {
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern  = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    return this.template.gsub(this.pattern, function(match) {
      var before = match[1];
      if (before == '\\') return match[2];
      return before + String.interpret(object[match[3]]);
    });
  }
}

var $break    = new Object();
var $continue = new Object();

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

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

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

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

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

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

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

  grep: function(pattern, iterator) {
    var results = [];
    this.each(function(value, index) {
      var stringValue = value.toString();
      if (stringValue.match(pattern))
        results.push((iterator || Prototype.K)(value, index));
    })
    return results;
  },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray
});
var $A = Array.from = function(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) {
    return iterable.toArray();
  } else {
    var results = [];
    for (var i = 0, length = iterable.length; i < length; i++)
      results.push(iterable[i]);
    return results;
  }
}

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse)
  Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  },

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

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

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

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

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(value && value.constructor == Array ?
        value.flatten() : [value]);
    });
  },

  without: function() {
    var values = $A(arguments);
    return this.select(function(value) {
      return !values.include(value);
    });
  },

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

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

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

  uniq: function() {
    return this.inject([], function(array, value) {
      return array.include(value) ? array : array.concat([value]);
    });
  },

  clone: function() {
    return [].concat(this);
  },

  size: function() {
    return this.length;
  },

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

Array.prototype.toArray = Array.prototype.clone;

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

if(window.opera){
  Array.prototype.concat = function(){
    var array = [];
    for(var i = 0, length = this.length; i < length; i++) array.push(this[i]);
    for(var i = 0, length = arguments.length; i < length; i++) {
      if(arguments[i].constructor == Array) {
        for(var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
          array.push(arguments[i][j]);
      } else {
        array.push(arguments[i]);
      }
    }
    return array;
  }
}
var Hash = function(obj) {
  Object.extend(this, obj || {});
};

Object.extend(Hash, {
  toQueryString: function(obj) {
    var parts = [];

	  this.prototype._each.call(obj, function(pair) {
      if (!pair.key) return;

      if (pair.value && pair.value.constructor == Array) {
        var values = pair.value.compact();
        if (values.length < 2) pair.value = values.reduce();
        else {
        	key = encodeURIComponent(pair.key);
          values.each(function(value) {
            value = value != undefined ? encodeURIComponent(value) : '';
            parts.push(key + '=' + encodeURIComponent(value));
          });
          return;
        }
      }
      if (pair.value == undefined) pair[1] = '';
      parts.push(pair.map(encodeURIComponent).join('='));
	  });

    return parts.join('&');
  }
});

Object.extend(Hash.prototype, Enumerable);
Object.extend(Hash.prototype, {
  _each: function(iterator) {
    for (var key in this) {
      var value = this[key];
      if (value && value == Hash.prototype[key]) continue;

      var pair = [key, value];
      pair.key = key;
      pair.value = value;
      iterator(pair);
    }
  },

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

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

  merge: function(hash) {
    return $H(hash).inject(this, function(mergedHash, pair) {
      mergedHash[pair.key] = pair.value;
      return mergedHash;
    });
  },

  remove: function() {
    var result;
    for(var i = 0, length = arguments.length; i < length; i++) {
      var value = this[arguments[i]];
      if (value !== undefined){
        if (result === undefined) result = value;
        else {
          if (result.constructor != Array) result = [result];
          result.push(value)
        }
      }
      delete this[arguments[i]];
    }
    return result;
  },

  toQueryString: function() {
    return Hash.toQueryString(this);
  },

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

function $H(object) {
  if (object && object.constructor == Hash) return object;
  return new Hash(object);
};
ObjectRange = Class.create();
Object.extend(ObjectRange.prototype, Enumerable);
Object.extend(ObjectRange.prototype, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

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

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

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

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 (typeof responder[callback] == 'function') {
        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 = function() {};
Ajax.Base.prototype = {
  setOptions: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   ''
    }
    Object.extend(this.options, options || {});

    this.options.method = this.options.method.toLowerCase();
    if (typeof this.options.parameters == 'string')
      this.options.parameters = this.options.parameters.toQueryParams();
  }
}

Ajax.Request = Class.create();
Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
  _complete: false,

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

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

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

    params = Hash.toQueryString(params);
    if (params && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) params += '&_='

    // when GET, append parameters to URL
    if (this.method == 'get' && params)
      this.url += (this.url.indexOf('?') > -1 ? '&' : '?') + params;

    try {
      Ajax.Responders.dispatch('onCreate', this, this.transport);

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

      if (this.options.asynchronous)
        setTimeout(function() { this.respondToReadyState(1) }.bind(this), 10);

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

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

      this.transport.send(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';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (typeof extras.push == 'function')
        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() {
    return !this.transport.status
        || (this.transport.status >= 200 && this.transport.status < 300);
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState];
    var transport = this.transport, json = this.evalJSON();

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

      if ((this.getHeader('Content-type') || 'text/javascript').strip().
        match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))
          this.evalResponse();
    }

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

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

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

  evalJSON: function() {
    try {
      var json = this.getHeader('X-JSON');
      return json ? eval('(' + json + ')') : null;
    } catch (e) { return null }
  },

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

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

Ajax.Updater = Class.create();

Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
  initialize: function(container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    }

    this.transport = Ajax.getTransport();
    this.setOptions(options);

    var onComplete = this.options.onComplete || Prototype.emptyFunction;
    this.options.onComplete = (function(transport, param) {
      this.updateContent();
      onComplete(transport, param);
    }).bind(this);

    this.request(url);
  },

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

    if (!this.options.evalScripts) response = response.stripScripts();

    if (receiver = $(receiver)) {
      if (this.options.insertion)
        new this.options.insertion(receiver, response);
      else
        receiver.update(response);
    }

    if (this.success()) {
      if (this.onComplete)
        setTimeout(this.onComplete.bind(this), 10);
    }
  }
});

Ajax.PeriodicalUpdater = Class.create();
Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
  initialize: function(container, url, options) {
    this.setOptions(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(request) {
    if (this.options.decay) {
      this.decay = (request.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = request.responseText;
    }
    this.timer = setTimeout(this.onTimerEvent.bind(this),
      this.decay * this.frequency * 1000);
  },

  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 (typeof element == 'string')
    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(query.snapshotItem(i));
    return results;
  };
}

document.getElementsByClassName = function(className, parentElement) {
  if (Prototype.BrowserFeatures.XPath) {
    q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
return document._getElementsByXPath(q,parentElement);
}else{
var children=($(parentElement)||document.body).getElementsByTagName('*');
var elements=[],child;
for(var i=0,length=children.length;i<length;i++){
child=children[i];
if(Element.hasClassName(child,className))
elements.push(Element.extend(child));
}
return elements;
}
};
if(!window.Element)
var Element=new Object();
Element.extend=function(element){
if(!element||_nativeExtensions||element.nodeType==3)return element;
if(!element._extended&&element.tagName&&element!=window){
var methods=Object.clone(Element.Methods),cache=Element.extend.cache;
if(element.tagName=='FORM')
Object.extend(methods,Form.Methods);
if(['INPUT','TEXTAREA','SELECT'].include(element.tagName))
Object.extend(methods,Form.Element.Methods);
Object.extend(methods,Element.Methods.Simulated);
for(var property in methods){
var value=methods[property];
if(typeof value=='function'&&!(property in element))
element[property]=cache.findOrStore(value);
}
}
element._extended=true;
return element;
};
Element.extend.cache={
findOrStore:function(value){
return this[value]=this[value]||function(){
return value.apply(null,[this].concat($A(arguments)));
}
}
};
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).style.display='none';
return element;
},
show:function(element){
$(element).style.display='';
return element;
},
remove:function(element){
element=$(element);
element.parentNode.removeChild(element);
return element;
},
update:function(element,html){
html=typeof html=='undefined'?'':html.toString();
$(element).innerHTML=html.stripScripts();
setTimeout(function(){html.evalScripts()},10);
return element;
},
replace:function(element,html){
element=$(element);
html=typeof html=='undefined'?'':html.toString();
if(element.outerHTML){
element.outerHTML=html.stripScripts();
}else{
var range=element.ownerDocument.createRange();
range.selectNodeContents(element);
element.parentNode.replaceChild(
range.createContextualFragment(html.stripScripts()),element);
}
setTimeout(function(){html.evalScripts()},10);
return element;
},
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 $A($(element).getElementsByTagName('*'));
},
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(typeof selector=='string')
selector=new Selector(selector);
return selector.match($(element));
},
up:function(element,expression,index){
return Selector.findElement($(element).ancestors(),expression,index);
},
down:function(element,expression,index){
return Selector.findElement($(element).descendants(),expression,index);
},
previous:function(element,expression,index){
return Selector.findElement($(element).previousSiblings(),expression,index);
},
next:function(element,expression,index){
return Selector.findElement($(element).nextSiblings(),expression,index);
},
getElementsBySelector:function(){
var args=$A(arguments),element=$(args.shift());
return Selector.findChildElements(element,args);
},
getElementsByClassName:function(element,className){
return document.getElementsByClassName(className,element);
},
readAttribute:function(element,name){
element=$(element);
if(document.all&&!window.opera){
var t=Element._attributeTranslations;
if(t.values[name])return t.values[name](element,name);
if(t.names[name])name=t.names[name];
var attribute=element.attributes[name];
if(attribute)return attribute.nodeValue;
}
return element.getAttribute(name);
},
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;
if(elementClassName.length==0)return false;
if(elementClassName==className||
elementClassName.match(new RegExp("(^|\\s)"+className+"(\\s|$)")))
return true;
return false;
},
addClassName:function(element,className){
if(!(element=$(element)))return;
Element.classNames(element).add(className);
return element;
},
removeClassName:function(element,className){
if(!(element=$(element)))return;
Element.classNames(element).remove(className);
return element;
},
toggleClassName:function(element,className){
if(!(element=$(element)))return;
Element.classNames(element)[element.hasClassName(className)?'remove':'add'](className);
return element;
},
observe:function(){
Event.observe.apply(Event,arguments);
return $A(arguments).first();
},
stopObserving:function(){
Event.stopObserving.apply(Event,arguments);
return $A(arguments).first();
},
cleanWhitespace:function(element){
element=$(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 $(element).innerHTML.match(/^\s*$/);
},
descendantOf:function(element,ancestor){
element=$(element),ancestor=$(ancestor);
while(element=element.parentNode)
if(element==ancestor)return true;
return false;
},
scrollTo:function(element){
element=$(element);
var pos=Position.cumulativeOffset(element);
window.scrollTo(pos[0],pos[1]);
return element;
},
getStyle:function(element,style){
element=$(element);
if(['float','cssFloat'].include(style))
style=(typeof element.style.styleFloat!='undefined'?'styleFloat':'cssFloat');
style=style.camelize();
var value=element.style[style];
if(!value){
if(document.defaultView&&document.defaultView.getComputedStyle){
var css=document.defaultView.getComputedStyle(element,null);
value=css?css[style]:null;
}else if(element.currentStyle){
value=element.currentStyle[style];
}
}
if((value=='auto')&&['width','height'].include(style)&&(element.getStyle('display')!='none'))
value=element['offset'+style.capitalize()]+'px';
if(window.opera&&['left','top','right','bottom'].include(style))
if(Element.getStyle(element,'position')=='static')value='auto';
if(style=='opacity'){
if(value)return parseFloat(value);
if(value=(element.getStyle('filter')||'').match(/alpha\(opacity=(.*)\)/))
if(value[1])return parseFloat(value[1])/100;
return 1.0;
}
return value=='auto'?null:value;
},
setStyle:function(element,style){
element=$(element);
for(var name in style){
var value=style[name];
if(name=='opacity'){
if(value==1){
value=(/Gecko/.test(navigator.userAgent)&&
!/Konqueror|Safari|KHTML/.test(navigator.userAgent))?0.999999:1.0;
if(/MSIE/.test(navigator.userAgent)&&!window.opera)
element.style.filter=element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'');
}else if(value===''){
if(/MSIE/.test(navigator.userAgent)&&!window.opera)
element.style.filter=element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'');
}else{
if(value<0.00001)value=0;
if(/MSIE/.test(navigator.userAgent)&&!window.opera)
element.style.filter=element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'')+
'alpha(opacity='+value*100+')';
}
}else if(['float','cssFloat'].include(name))name=(typeof element.style.styleFloat!='undefined')?'styleFloat':'cssFloat';
element.style[name.camelize()]=value;
}
return element;
},
getDimensions:function(element){
element=$(element);
var display=$(element).getStyle('display');
if(display!='none'&&display!=null)
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';
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(window.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.style.overflow||'auto';
if((Element.getStyle(element,'overflow')||'visible')!='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;
}
};
Object.extend(Element.Methods,{childOf:Element.Methods.descendantOf});
Element._attributeTranslations={};
Element._attributeTranslations.names={
colspan:"colSpan",
rowspan:"rowSpan",
valign:"vAlign",
datetime:"dateTime",
accesskey:"accessKey",
tabindex:"tabIndex",
enctype:"encType",
maxlength:"maxLength",
readonly:"readOnly",
longdesc:"longDesc"
};
Element._attributeTranslations.values={
_getAttr:function(element,attribute){
return element.getAttribute(attribute,2);
},
_flag:function(element,attribute){
return $(element).hasAttribute(attribute)?attribute:null;
},
style:function(element){
return element.style.cssText.toLowerCase();
},
title:function(element){
var node=element.getAttributeNode('title');
return node.specified?node.nodeValue:null;
}
};
Object.extend(Element._attributeTranslations.values,{
href:Element._attributeTranslations.values._getAttr,
src:Element._attributeTranslations.values._getAttr,
disabled:Element._attributeTranslations.values._flag,
checked:Element._attributeTranslations.values._flag,
readonly:Element._attributeTranslations.values._flag,
multiple:Element._attributeTranslations.values._flag
});
Element.Methods.Simulated={
hasAttribute:function(element,attribute){
var t=Element._attributeTranslations;
attribute=t.names[attribute]||attribute;
return $(element).getAttributeNode(attribute).specified;
}
};
if(document.all&&!window.opera){
Element.Methods.update=function(element,html){
element=$(element);
html=typeof html=='undefined'?'':html.toString();
var tagName=element.tagName.toUpperCase();
if(['THEAD','TBODY','TR','TD'].include(tagName)){
var div=document.createElement('div');
switch(tagName){
case'THEAD':
case'TBODY':
div.innerHTML='<table><tbody>'+html.stripScripts()+'</tbody></table>';
depth=2;
break;
case'TR':
div.innerHTML='<table><tbody><tr>'+html.stripScripts()+'</tr></tbody></table>';
depth=3;
break;
case'TD':
div.innerHTML='<table><tbody><tr><td>'+html.stripScripts()+'</td></tr></tbody></table>';
depth=4;
}
$A(element.childNodes).each(function(node){
element.removeChild(node)
});
depth.times(function(){div=div.firstChild});
$A(div.childNodes).each(
function(node){element.appendChild(node)});
}else{
element.innerHTML=html.stripScripts();
}
setTimeout(function(){html.evalScripts()},10);
return element;
}
};
Object.extend(Element,Element.Methods);
var _nativeExtensions=false;
if(/Konqueror|Safari|KHTML/.test(navigator.userAgent))
['','Form','Input','TextArea','Select'].each(function(tag){
var className='HTML'+tag+'Element';
if(window[className])return;
var klass=window[className]={};
klass.prototype=document.createElement(tag?tag.toLowerCase():'div').__proto__;
});
Element.addMethods=function(methods){
Object.extend(Element.Methods,methods||{});
function copy(methods,destination,onlyIfAbsent){
onlyIfAbsent=onlyIfAbsent||false;
var cache=Element.extend.cache;
for(var property in methods){
var value=methods[property];
if(!onlyIfAbsent||!(property in destination))
destination[property]=cache.findOrStore(value);
}
}
if(typeof HTMLElement!='undefined'){
copy(Element.Methods,HTMLElement.prototype);
copy(Element.Methods.Simulated,HTMLElement.prototype,true);
copy(Form.Methods,HTMLFormElement.prototype);
[HTMLInputElement,HTMLTextAreaElement,HTMLSelectElement].each(function(klass){
copy(Form.Element.Methods,klass.prototype);
});
_nativeExtensions=true;
}
}
var Toggle=new Object();
Toggle.display=Element.toggle;
Abstract.Insertion=function(adjacency){
this.adjacency=adjacency;
}
Abstract.Insertion.prototype={
initialize:function(element,content){
this.element=$(element);
this.content=content.stripScripts();
if(this.adjacency&&this.element.insertAdjacentHTML){
try{
this.element.insertAdjacentHTML(this.adjacency,this.content);
}catch(e){
var tagName=this.element.tagName.toUpperCase();
if(['TBODY','TR'].include(tagName)){
this.insertContent(this.contentFromAnonymousTable());
}else{
throw e;
}
}
}else{
this.range=this.element.ownerDocument.createRange();
if(this.initializeRange)this.initializeRange();
this.insertContent([this.range.createContextualFragment(this.content)]);
}
setTimeout(function(){content.evalScripts()},10);
},
contentFromAnonymousTable:function(){
var div=document.createElement('div');
div.innerHTML='<table><tbody>'+this.content+'</tbody></table>';
return $A(div.childNodes[0].childNodes[0].childNodes);
}
}
var Insertion=new Object();
Insertion.Before=Class.create();
Insertion.Before.prototype=Object.extend(new Abstract.Insertion('beforeBegin'),{
initializeRange:function(){
this.range.setStartBefore(this.element);
},
insertContent:function(fragments){
fragments.each((function(fragment){
this.element.parentNode.insertBefore(fragment,this.element);
}).bind(this));
}
});
Insertion.Top=Class.create();
Insertion.Top.prototype=Object.extend(new Abstract.Insertion('afterBegin'),{
initializeRange:function(){
this.range.selectNodeContents(this.element);
this.range.collapse(true);
},
insertContent:function(fragments){
fragments.reverse(false).each((function(fragment){
this.element.insertBefore(fragment,this.element.firstChild);
}).bind(this));
}
});
Insertion.Bottom=Class.create();
Insertion.Bottom.prototype=Object.extend(new Abstract.Insertion('beforeEnd'),{
initializeRange:function(){
this.range.selectNodeContents(this.element);
this.range.collapse(this.element);
},
insertContent:function(fragments){
fragments.each((function(fragment){
this.element.appendChild(fragment);
}).bind(this));
}
});
Insertion.After=Class.create();
Insertion.After.prototype=Object.extend(new Abstract.Insertion('afterEnd'),{
initializeRange:function(){
this.range.setStartAfter(this.element);
},
insertContent:function(fragments){
fragments.each((function(fragment){
this.element.parentNode.insertBefore(fragment,
this.element.nextSibling);
}).bind(this));
}
});
Element.ClassNames=Class.create();
Element.ClassNames.prototype={
initialize:function(element){
this.element=$(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);
var Selector=Class.create();
Selector.prototype={
initialize:function(expression){
this.params={classNames:[]};
this.expression=expression.toString().strip();
this.parseExpression();
this.compileMatcher();
},
parseExpression:function(){
function abort(message){throw'Parse error in selector: '+message;}
if(this.expression=='')abort('empty expression');
var params=this.params,expr=this.expression,match,modifier,clause,rest;
while(match=expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)){
params.attributes=params.attributes||[];
params.attributes.push({name:match[2],operator:match[3],value:match[4]||match[5]||''});
expr=match[1];
}
if(expr=='*')return this.params.wildcard=true;
while(match=expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)){
modifier=match[1],clause=match[2],rest=match[3];
switch(modifier){
case'#':params.id=clause;break;
case'.':params.classNames.push(clause);break;
case'':
case undefined:params.tagName=clause.toUpperCase();break;
default:abort(expr.inspect());
}
expr=rest;
}
if(expr.length>0)abort(expr.inspect());
},
buildMatchExpression:function(){
var params=this.params,conditions=[],clause;
if(params.wildcard)
conditions.push('true');
if(clause=params.id)
conditions.push('element.readAttribute("id") == '+clause.inspect());
if(clause=params.tagName)
conditions.push('element.tagName.toUpperCase() == '+clause.inspect());
if((clause=params.classNames).length>0)
for(var i=0,length=clause.length;i<length;i++)
conditions.push('element.hasClassName('+clause[i].inspect()+')');
if(clause=params.attributes){
clause.each(function(attribute){
var value='element.readAttribute('+attribute.name.inspect()+')';
var splitValueBy=function(delimiter){
return value+' && '+value+'.split('+delimiter.inspect()+')';
}
switch(attribute.operator){
case'=':conditions.push(value+' == '+attribute.value.inspect());break;
case'~=':conditions.push(splitValueBy(' ')+'.include('+attribute.value.inspect()+')');break;
case'|=':conditions.push(
splitValueBy('-')+'.first().toUpperCase() == '+attribute.value.toUpperCase().inspect()
);break;
case'!=':conditions.push(value+' != '+attribute.value.inspect());break;
case'':
case undefined:conditions.push('element.hasAttribute('+attribute.name.inspect()+')');break;
default:throw'Unknown operator '+attribute.operator+' in selector';
}
});
}
return conditions.join(' && ');
},
compileMatcher:function(){
this.match=new Function('element','if (!element.tagName) return false; \
      element = $(element); \
      return '+this.buildMatchExpression());
},
findElements:function(scope){
var element;
if(element=$(this.params.id))
if(this.match(element))
if(!scope||Element.childOf(element,scope))
return[element];
scope=(scope||document).getElementsByTagName(this.params.tagName||'*');
var results=[];
for(var i=0,length=scope.length;i<length;i++)
if(this.match(element=scope[i]))
results.push(Element.extend(element));
return results;
},
toString:function(){
return this.expression;
}
}
Object.extend(Selector,{
matchElements:function(elements,expression){
var selector=new Selector(expression);
return elements.select(selector.match.bind(selector)).map(Element.extend);
},
findElement:function(elements,expression,index){
if(typeof expression=='number')index=expression,expression=false;
return Selector.matchElements(elements,expression||'*')[index||0];
},
findChildElements:function(element,expressions){
return expressions.map(function(expression){
return expression.match(/[^\s"]+(?:"[^"]*"[^\s"]+)*/g).inject([null],function(results,expr){
var selector=new Selector(expr);
return results.inject([],function(elements,result){
return elements.concat(selector.findElements(result||element));
});
});
}).flatten();
}
});
function $$(){
return Selector.findChildElements(document,$A(arguments));
}
var Form={
reset:function(form){
$(form).reset();
return form;
},
serializeElements:function(elements,getHash){
var data=elements.inject({},function(result,element){
if(!element.disabled&&element.name){
var key=element.name,value=$(element).getValue();
if(value!=undefined){
if(result[key]){
if(result[key].constructor!=Array)result[key]=[result[key]];
result[key].push(value);
}
else result[key]=value;
}
}
return result;
});
return getHash?data:Hash.toQueryString(data);
}
};
Form.Methods={
serialize:function(form,getHash){
return Form.serializeElements(Form.getElements(form),getHash);
},
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().each(function(element){
element.blur();
element.disabled='true';
});
return form;
},
enable:function(form){
form=$(form);
form.getElements().each(function(element){
element.disabled='';
});
return form;
},
findFirstElement:function(form){
return $(form).getElements().find(function(element){
return element.type!='hidden'&&!element.disabled&&
['input','select','textarea'].include(element.tagName.toLowerCase());
});
},
focusFirstElement:function(form){
form=$(form);
form.findFirstElement().activate();
return form;
}
}
Object.extend(Form,Form.Methods);
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 Hash.toQueryString(pair);
}
}
return'';
},
getValue:function(element){
element=$(element);
var method=element.tagName.toLowerCase();
return Form.Element.Serializers[method](element);
},
clear:function(element){
$(element).value='';
return element;
},
present:function(element){
return $(element).value!='';
},
activate:function(element){
element=$(element);
element.focus();
if(element.select&&(element.tagName.toLowerCase()!='input'||
!['button','reset','submit'].include(element.type)))
element.select();
return element;
},
disable:function(element){
element=$(element);
element.disabled=true;
return element;
},
enable:function(element){
element=$(element);
element.blur();
element.disabled=false;
return element;
}
}
Object.extend(Form.Element,Form.Element.Methods);
var Field=Form.Element;
var $F=Form.Element.getValue;
Form.Element.Serializers={
input:function(element){
switch(element.type.toLowerCase()){
case'checkbox':
case'radio':
return Form.Element.Serializers.inputSelector(element);
default:
return Form.Element.Serializers.textarea(element);
}
},
inputSelector:function(element){
return element.checked?element.value:null;
},
textarea:function(element){
return element.value;
},
select:function(element){
return this[element.type=='select-one'?
'selectOne':'selectMany'](element);
},
selectOne:function(element){
var index=element.selectedIndex;
return index>=0?this.optionValue(element.options[index]):null;
},
selectMany:function(element){
var values,length=element.length;
if(!length)return null;
for(var i=0,values=[];i<length;i++){
var opt=element.options[i];
if(opt.selected)values.push(this.optionValue(opt));
}
return values;
},
optionValue:function(opt){
return Element.extend(opt).hasAttribute('value')?opt.value:opt.text;
}
}
Abstract.TimedObserver=function(){}
Abstract.TimedObserver.prototype={
initialize:function(element,frequency,callback){
this.frequency=frequency;
this.element=$(element);
this.callback=callback;
this.lastValue=this.getValue();
this.registerCallback();
},
registerCallback:function(){
setInterval(this.onTimerEvent.bind(this),this.frequency*1000);
},
onTimerEvent:function(){
var value=this.getValue();
var changed=('string'==typeof this.lastValue&&'string'==typeof value
?this.lastValue!=value:String(this.lastValue)!=String(value));
if(changed){
this.callback(this.element,value);
this.lastValue=value;
}
}
}
Form.Element.Observer=Class.create();
Form.Element.Observer.prototype=Object.extend(new Abstract.TimedObserver(),{
getValue:function(){
return Form.Element.getValue(this.element);
}
});
Form.Observer=Class.create();
Form.Observer.prototype=Object.extend(new Abstract.TimedObserver(),{
getValue:function(){
return Form.serialize(this.element);
}
});
Abstract.EventObserver=function(){}
Abstract.EventObserver.prototype={
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.bind(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();
Form.Element.EventObserver.prototype=Object.extend(new Abstract.EventObserver(),{
getValue:function(){
return Form.Element.getValue(this.element);
}
});
Form.EventObserver=Class.create();
Form.EventObserver.prototype=Object.extend(new Abstract.EventObserver(),{
getValue:function(){
return Form.serialize(this.element);
}
});
if(!window.Event){
var Event=new Object();
}
Object.extend(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,
element:function(event){
return event.target||event.srcElement;
},
isLeftClick:function(event){
return(((event.which)&&(event.which==1))||
((event.button)&&(event.button==1)));
},
pointerX:function(event){
return event.pageX||(event.clientX+
(document.documentElement.scrollLeft||document.body.scrollLeft));
},
pointerY:function(event){
return event.pageY||(event.clientY+
(document.documentElement.scrollTop||document.body.scrollTop));
},
stop:function(event){
if(event.preventDefault){
event.preventDefault();
event.stopPropagation();
}else{
event.returnValue=false;
event.cancelBubble=true;
}
},
findElement:function(event,tagName){
var element=Event.element(event);
while(element.parentNode&&(!element.tagName||
(element.tagName.toUpperCase()!=tagName.toUpperCase())))
element=element.parentNode;
return element;
},
observers:false,
_observeAndCache:function(element,name,observer,useCapture){
if(!this.observers)this.observers=[];
if(element.addEventListener){
this.observers.push([element,name,observer,useCapture]);
element.addEventListener(name,observer,useCapture);
}else if(element.attachEvent){
this.observers.push([element,name,observer,useCapture]);
element.attachEvent('on'+name,observer);
}
},
unloadCache:function(){
if(!Event.observers)return;
for(var i=0,length=Event.observers.length;i<length;i++){
Event.stopObserving.apply(this,Event.observers[i]);
Event.observers[i][0]=null;
}
Event.observers=false;
},
observe:function(element,name,observer,useCapture){
element=$(element);
useCapture=useCapture||false;
if(name=='keypress'&&
(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
||element.attachEvent))
name='keydown';
Event._observeAndCache(element,name,observer,useCapture);
},
stopObserving:function(element,name,observer,useCapture){
element=$(element);
useCapture=useCapture||false;
if(name=='keypress'&&
(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
||element.detachEvent))
name='keydown';
if(element.removeEventListener){
element.removeEventListener(name,observer,useCapture);
}else if(element.detachEvent){
try{
element.detachEvent('on'+name,observer);
}catch(e){}
}
}
});
if(navigator.appVersion.match(/\bMSIE\b/))
Event.observe(window,'unload',Event.unloadCache,false);
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;
},
realOffset:function(element){
var valueT=0,valueL=0;
do{
valueT+=element.scrollTop||0;
valueL+=element.scrollLeft||0;
element=element.parentNode;
}while(element);
return[valueL,valueT];
},
cumulativeOffset:function(element){
var valueT=0,valueL=0;
do{
valueT+=element.offsetTop||0;
valueL+=element.offsetLeft||0;
element=element.offsetParent;
}while(element);
return[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=='BODY')break;
var p=Element.getStyle(element,'position');
if(p=='relative'||p=='absolute')break;
}
}while(element);
return[valueL,valueT];
},
offsetParent: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;
},
within:function(element,x,y){
if(this.includeScrollOffsets)
return this.withinIncludingScrolloffsets(element,x,y);
this.xcomp=x;
this.ycomp=y;
this.offset=this.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=this.realOffset(element);
this.xcomp=x+offsetcache[0]-this.deltaX;
this.ycomp=y+offsetcache[1]-this.deltaY;
this.offset=this.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;
},
page:function(forElement){
var valueT=0,valueL=0;
var element=forElement;
do{
valueT+=element.offsetTop||0;
valueL+=element.offsetLeft||0;
if(element.offsetParent==document.body)
if(Element.getStyle(element,'position')=='absolute')break;
}while(element=element.offsetParent);
element=forElement;
do{
if(!window.opera||element.tagName=='BODY'){
valueT-=element.scrollTop||0;
valueL-=element.scrollLeft||0;
}
}while(element=element.parentNode);
return[valueL,valueT];
},
clone:function(source,target){
var options=Object.extend({
setLeft:true,
setTop:true,
setWidth:true,
setHeight:true,
offsetTop:0,
offsetLeft:0
},arguments[2]||{})
source=$(source);
var p=Position.page(source);
target=$(target);
var delta=[0,0];
var parent=null;
if(Element.getStyle(target,'position')=='absolute'){
parent=Position.offsetParent(target);
delta=Position.page(parent);
}
if(parent==document.body){
delta[0]-=document.body.offsetLeft;
delta[1]-=document.body.offsetTop;
}
if(options.setLeft)target.style.left=(p[0]-delta[0]+options.offsetLeft)+'px';
if(options.setTop)target.style.top=(p[1]-delta[1]+options.offsetTop)+'px';
if(options.setWidth)target.style.width=source.offsetWidth+'px';
if(options.setHeight)target.style.height=source.offsetHeight+'px';
},
absolutize:function(element){
element=$(element);
if(element.style.position=='absolute')return;
Position.prepare();
var offsets=Position.positionedOffset(element);
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';
},
relativize:function(element){
element=$(element);
if(element.style.position=='relative')return;
Position.prepare();
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;
}
}
if(/Konqueror|Safari|KHTML/.test(navigator.userAgent)){
Position.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[valueL,valueT];
}
}
Element.addMethods();