var Prototype={
 Version:'1.6.0.2',

 Browser:{
 IE:!!(window.attachEvent && !window.opera),
 Opera:!!window.opera,
 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,
 ElementExtensions:!!window.HTMLElement,
 SpecificElementExtensions:
 document.createElement('div').__proto__ &&
 document.createElement('div').__proto__ !==
 document.createElement('form').__proto__
 },
 ScriptFragment:'<script[^>]*>([\\S\\s]*?)<\/script>',
 JSONFilter:/^\/\*-secure-([\s\S]*)\*\/\s*$/,
 emptyFunction:function(){ },
 K:function(x){ return x }
};
if (Prototype.Browser.MobileSafari)
 Prototype.BrowserFeatures.SpecificElementExtensions=false;
var Class={
 create:function(){
 var parent=null, properties=$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;
 }
};
Class.Methods={
 addMethods:function(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=Object.extend((function(m){
 return function(){ return ancestor[m].apply(this, arguments) };
 })(property).wrap(method), {
 valueOf:function(){ return method },
 toString:function(){ return method.toString() }
 });
 }
 this.prototype[property]=value;
 }
 return this;
 }
};
var Abstract={ };
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.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;
 }
 },
 toJSON:function(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 (Object.isElement(object)) return;
 var results=[];
 for (var property in object){
 var value=Object.toJSON(object[property]);
 if (!Object.isUndefined(value))
 results.push(property.toJSON()+':'+value);
 }
 return '{'+results.join(', ')+'}';
 },
 toQueryString:function(object){
 return $H(object).toQueryString();
 },
 toHTML:function(object){
 return object && object.toHTML?object.toHTML() :String.interpret(object);
 },
 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);
 },
 isElement:function(object){
 return object && object.nodeType==1;
 },
 isArray:function(object){
 return object != null && typeof object=="object" &&
 'splice' in object && 'join' in object;
 },
 isHash:function(object){
 return object instanceof Hash;
 },
 isFunction:function(object){
 return typeof object=="function";
 },
 isString:function(object){
 return typeof object=="string";
 },
 isNumber:function(object){
 return typeof object=="number";
 },
 isUndefined:function(object){
 return typeof object=="undefined";
 }
});
Object.extend(Function.prototype, {
 argumentNames:function(){
 var names=this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
 return names.length==1 && !names[0]?[] :names;
 },
 bind:function(){
 if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
 var __method=this, args=$A(arguments), object=args.shift();
 return function(){
 return __method.apply(object, args.concat($A(arguments)));
 }
 },
 bindAsEventListener:function(){
 var __method=this, args=$A(arguments), object=args.shift();
 return function(event){
 return __method.apply(object, [event || window.event].concat(args));
 }
 },
 curry:function(){
 if (!arguments.length) return this;
 var __method=this, args=$A(arguments);
 return function(){
 return __method.apply(this, args.concat($A(arguments)));
 }
 },
 delay:function(){
 var __method=this, args=$A(arguments), timeout=args.shift() * 1000;
 return window.setTimeout(function(){
 return __method.apply(__method, args);
 }, timeout);
 },
 wrap:function(wrapper){
 var __method=this;
 return function(){
 return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
 }
 },
 methodize:function(){
 if (this._methodized) return this._methodized;
 var __method=this;
 return this._methodized=function(){
 return __method.apply(null, [this].concat($A(arguments)));
 };
 }
});
Function.prototype.defer=Function.prototype.delay.curry(0.01);
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"';
};
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;
 }
};
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, {
 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=Object.isUndefined(count)?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 String(this);
 },
 truncate:function(length, truncation){
 length=length || 30;
 truncation=Object.isUndefined(truncation)?'...' :truncation;
 return this.length>length ?
 this.slice(0, length - truncation.length)+truncation :String(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 self=arguments.callee;
 self.text.data=this;
 return self.div.innerHTML;
 },
 unescapeHTML:function(){
 var div=new Element('div');
 div.innerHTML=this.stripTags();
 return div.childNodes[0]?(div.childNodes.length>1 ?
 $A(div.childNodes).inject('', function(memo, node){ return memo+node.nodeValue }) :
 div.childNodes[0].nodeValue) :'';
 },
 toQueryParams:function(separator){
 var match=this.strip().match(/([^?#]*)(#.*)?$/);
 if (!match) return { };
 return match[1].split(separator || '&').inject({ }, function(hash, pair){
 if ((pair=pair.split('='))[0]){
 var 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;
 });
 },
 toArray:function(){
 return this.split('');
 },
 succ:function(){
 return this.slice(0, this.length - 1) +
 String.fromCharCode(this.charCodeAt(this.length - 1)+1);
 },
 times:function(count){
 return count < 1?'' :new Array(count+1).join(this);
 },
 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.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, '\\\'')+"'";
 },
 toJSON:function(){
 return this.inspect(true);
 },
 unfilterJSON:function(filter){
 return this.sub(filter || Prototype.JSONFilter, '#{1}');
 },
 isJSON:function(){
 var str=this;
 if (str.blank()) return false;
 str=this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
 return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
 },
 evalJSON:function(sanitize){
 var json=this.unfilterJSON();
 try {
 if (!sanitize || json.isJSON()) return eval('('+json+')');
 } catch (e){ }
 throw new SyntaxError('Badly formed JSON string:'+this.inspect());
 },
 include:function(pattern){
 return this.indexOf(pattern)>-1;
 },
 startsWith:function(pattern){
 return this.indexOf(pattern) === 0;
 },
 endsWith:function(pattern){
 var d=this.length - pattern.length;
 return d >= 0 && this.lastIndexOf(pattern) === d;
 },
 empty:function(){
 return this=='';
 },
 blank:function(){
 return /^\s*$/.test(this);
 },
 interpolate:function(object, pattern){
 return new Template(this, pattern).evaluate(object);
 }
});
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.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
 }
});
String.prototype.gsub.prepareReplacement=function(replacement){
 if (Object.isFunction(replacement)) return replacement;
 var template=new Template(replacement);
 return function(match){ return template.evaluate(match) };
};
String.prototype.parseQuery=String.prototype.toQueryParams;
Object.extend(String.prototype.escapeHTML, {
 div:document.createElement('div'),
 text:document.createTextNode('')
});
with (String.prototype.escapeHTML) div.appendChild(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={
 each:function(iterator, context){
 var index=0;
 iterator=iterator.bind(context);
 try {
 this._each(function(value){
 iterator(value, index++);
 });
 } catch (e){
 if (e != $break) throw e;
 }
 return this;
 },
 eachSlice:function(number, iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var index=-number, slices=[], array=this.toArray();
 while ((index += number) < array.length)
 slices.push(array.slice(index, index+number));
 return slices.collect(iterator, context);
 },
 all:function(iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var result=true;
 this.each(function(value, index){
 result=result && !!iterator(value, index);
 if (!result) throw $break;
 });
 return result;
 },
 any:function(iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var result=false;
 this.each(function(value, index){
 if (result=!!iterator(value, index))
 throw $break;
 });
 return result;
 },
 collect:function(iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var results=[];
 this.each(function(value, index){
 results.push(iterator(value, index));
 });
 return results;
 },
 detect:function(iterator, context){
 iterator=iterator.bind(context);
 var result;
 this.each(function(value, index){
 if (iterator(value, index)){
 result=value;
 throw $break;
 }
 });
 return result;
 },
 findAll:function(iterator, context){
 iterator=iterator.bind(context);
 var results=[];
 this.each(function(value, index){
 if (iterator(value, index))
 results.push(value);
 });
 return results;
 },
 grep:function(filter, iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var results=[];
 if (Object.isString(filter))
 filter=new RegExp(filter);
 this.each(function(value, index){
 if (filter.match(value))
 results.push(iterator(value, index));
 });
 return results;
 },
 include:function(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 $break;
 }
 });
 return found;
 },
 inGroupsOf:function(number, fillWith){
 fillWith=Object.isUndefined(fillWith)?null :fillWith;
 return this.eachSlice(number, function(slice){
 while(slice.length < number) slice.push(fillWith);
 return slice;
 });
 },
 inject:function(memo, iterator, context){
 iterator=iterator.bind(context);
 this.each(function(value, index){
 memo=iterator(memo, value, index);
 });
 return memo;
 },
 invoke:function(method){
 var args=$A(arguments).slice(1);
 return this.map(function(value){
 return value[method].apply(value, args);
 });
 },
 max:function(iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var result;
 this.each(function(value, index){
 value=iterator(value, index);
 if (result==null || value >= result)
 result=value;
 });
 return result;
 },
 min:function(iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var result;
 this.each(function(value, index){
 value=iterator(value, index);
 if (result==null || value < result)
 result=value;
 });
 return result;
 },
 partition:function(iterator, context){
 iterator=iterator?iterator.bind(context) :Prototype.K;
 var trues=[], falses=[];
 this.each(function(value, index){
 (iterator(value, index) ?
 trues :falses).push(value);
 });
 return [trues, falses];
 },
 pluck:function(property){
 var results=[];
 this.each(function(value){
 results.push(value[property]);
 });
 return results;
 },
 reject:function(iterator, context){
 iterator=iterator.bind(context);
 var results=[];
 this.each(function(value, index){
 if (!iterator(value, index))
 results.push(value);
 });
 return results;
 },
 sortBy:function(iterator, context){
 iterator=iterator.bind(context);
 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=$A(arguments);
 if (Object.isFunction(args.last()))
 iterator=args.pop();
 var collections=[this].concat(args).map($A);
 return this.map(function(value, index){
 return iterator(collections.pluck(index));
 });
 },
 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,
 filter:Enumerable.findAll,
 member:Enumerable.include,
 entries:Enumerable.toArray,
 every:Enumerable.all,
 some:Enumerable.any
});
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){
 $A=function(iterable){
 if (!iterable) return [];
 if (!(Object.isFunction(iterable) && iterable=='[object NodeList]') &&
 iterable.toArray) return iterable.toArray();
 var length=iterable.length || 0, results=new Array(length);
 while (length--) results[length]=iterable[length];
 return results;
 };
}
Array.from=$A;
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(Object.isArray(value) ?
 value.flatten() :[value]);
 });
 },
 without:function(){
 var values=$A(arguments);
 return this.select(function(value){
 return !values.include(value);
 });
 },
 reverse:function(inline){
 return (inline !== false?this :this.toArray())._reverse();
 },
 reduce:function(){
 return this.length>1?this :this[0];
 },
 uniq:function(sorted){
 return this.inject([], function(array, value, index){
 if (0==index || (sorted?array.last() != value :!array.include(value)))
 array.push(value);
 return array;
 });
 },
 intersect:function(array){
 return this.uniq().findAll(function(item){
 return array.detect(function(value){ return item === value });
 });
 },
 clone:function(){
 return [].concat(this);
 },
 size:function(){
 return this.length;
 },
 inspect:function(){
 return '['+this.map(Object.inspect).join(', ')+']';
 },
 toJSON:function(){
 var results=[];
 this.each(function(object){
 var value=Object.toJSON(object);
 if (!Object.isUndefined(value)) results.push(value);
 });
 return '['+results.join(', ')+']';
 }
});
if (Object.isFunction(Array.prototype.forEach))
 Array.prototype._each=Array.prototype.forEach;
if (!Array.prototype.indexOf) Array.prototype.indexOf=function(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;
};
if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf=function(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;
};
Array.prototype.toArray=Array.prototype.clone;
function $w(string){
 if (!Object.isString(string)) return [];
 string=string.strip();
 return string?string.split(/\s+/) :[];
}
if (Prototype.Browser.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 (Object.isArray(arguments[i])){
 for (var j=0, arrayLength=arguments[i].length; j < arrayLength; j++)
 array.push(arguments[i][j]);
 } else {
 array.push(arguments[i]);
 }
 }
 return array;
 };
}
Object.extend(Number.prototype, {
 toColorPart:function(){
 return this.toPaddedString(2, 16);
 },
 succ:function(){
 return this+1;
 },
 times:function(iterator){
 $R(0, this, true).each(iterator);
 return this;
 },
 toPaddedString:function(length, radix){
 var string=this.toString(radix || 10);
 return '0'.times(length - string.length)+string;
 },
 toJSON:function(){
 return isFinite(this)?this.toString() :'null';
 }
});
$w('abs round ceil floor').each(function(method){
 Number.prototype[method]=Math[method].methodize();
});
function $H(object){
 return new Hash(object);
};
var Hash=Class.create(Enumerable, (function(){
 function toQueryPair(key, value){
 if (Object.isUndefined(value)) return key;
 return key+'='+encodeURIComponent(String.interpret(value));
 }
 return {
 initialize:function(object){
 this._object=Object.isHash(object)?object.toObject() :Object.clone(object);
 },
 _each:function(iterator){
 for (var key in this._object){
 var value=this._object[key], pair=[key, value];
 pair.key=key;
 pair.value=value;
 iterator(pair);
 }
 },
 set:function(key, value){
 return this._object[key]=value;
 },
 get:function(key){
 return this._object[key];
 },
 unset:function(key){
 var value=this._object[key];
 delete this._object[key];
 return value;
 },
 toObject:function(){
 return Object.clone(this._object);
 },
 keys:function(){
 return this.pluck('key');
 },
 values:function(){
 return this.pluck('value');
 },
 index:function(value){
 var match=this.detect(function(pair){
 return pair.value === value;
 });
 return match && match.key;
 },
 merge:function(object){
 return this.clone().update(object);
 },
 update:function(object){
 return new Hash(object).inject(this, function(result, pair){
 result.set(pair.key, pair.value);
 return result;
 });
 },
 toQueryString:function(){
 return this.map(function(pair){
 var key=encodeURIComponent(pair.key), values=pair.value;

 if (values && typeof values=='object'){
 if (Object.isArray(values))
 return values.map(toQueryPair.curry(key)).join('&');
 }
 return toQueryPair(key, values);
 }).join('&');
 },
 inspect:function(){
 return '#<Hash:{'+this.map(function(pair){
 return pair.map(Object.inspect).join(':');
 }).join(', ')+'}>';
 },
 toJSON:function(){
 return Object.toJSON(this.toObject());
 },
 clone:function(){
 return new Hash(this);
 }
 }
})());
Hash.prototype.toTemplateReplacements=Hash.prototype.toObject;
Hash.from=$H;
var ObjectRange=Class.create(Enumerable, {
 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 $R=function(start, end, exclusive){
 return new ObjectRange(start, end, exclusive);
};
var Ajax={
 getTransport:function(){
 return Try.these(
 function(){return new XMLHttpRequest()},
 function(){return new ActiveXObject('Msxml2.XMLHTTP')},
 function(){return new ActiveXObject('Microsoft.XMLHTTP')}
 ) || false;
 },
 activeRequestCount:0
};
Ajax.Responders={
 responders:[],
 _each:function(iterator){
 this.responders._each(iterator);
 },
 register:function(responder){
 if (!this.include(responder))
 this.responders.push(responder);
 },
 unregister:function(responder){
 this.responders=this.responders.without(responder);
 },
 dispatch:function(callback, request, transport, json){
 this.each(function(responder){
 if (Object.isFunction(responder[callback])){
 try {
 responder[callback].apply(responder, [request, transport, json]);
 } catch (e){ }
 }
 });
 }
};
Object.extend(Ajax.Responders, Enumerable);
Ajax.Responders.register({
 onCreate:function(){ Ajax.activeRequestCount++ },
 onComplete:function(){ Ajax.activeRequestCount-- }
});
Ajax.Base=Class.create({
 initialize:function(options){
 this.options={
 method:'post',
 asynchronous:true,
 contentType:'application/x-www-form-urlencoded',
 encoding:'UTF-8',
 parameters:'',
 evalJSON:true,
 evalJS:true
 };
 Object.extend(this.options, options || { });
 this.options.method=this.options.method.toLowerCase();
 if (Object.isString(this.options.parameters))
 this.options.parameters=this.options.parameters.toQueryParams();
 else if (Object.isHash(this.options.parameters))
 this.options.parameters=this.options.parameters.toObject();
 }
});
Ajax.Request=Class.create(Ajax.Base, {
 _complete:false,
 initialize:function($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);
 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 :'');
 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(){
 var element=this.Element;
 this.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(this.Element, element || { });
}).call(window);
Element.cache={ };
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, 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(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=$(element);
 var id=element.readAttribute('id'), self=arguments.callee;
 if (id) return id;
 do { id='anonymous_element_'+self.counter++ } while ($(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);
 var originalAncestor=ancestor;

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

 if (element.sourceIndex && !Prototype.Browser.Opera){
 var e=element.sourceIndex, a=ancestor.sourceIndex,
 nextAncestor=ancestor.nextSibling;
 if (!nextAncestor){
 do { ancestor=ancestor.parentNode; }
 while (!(nextAncestor=ancestor.nextSibling) && ancestor.parentNode);
 }
 if (nextAncestor && nextAncestor.sourceIndex)
 return (e>a && e < nextAncestor.sourceIndex);
 }

 while (element=element.parentNode)
 if (element==originalAncestor) 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){
 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';
 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.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=='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;
 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.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=='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;
 }
};
Element.Methods.identify.counter=1;
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);
 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);
 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.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);
 return attribute?attribute.toString().slice(23, -2) :null;
 },
 _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').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=='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);
if (!Prototype.BrowserFeatures.ElementExtensions &&
 document.createElement('div').__proto__){
 window.HTMLElement={ };
 window.HTMLElement.prototype=document.createElement('div').__proto__;
 Prototype.BrowserFeatures.ElementExtensions=true;
}
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, 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];

 window[klass]={ };
 window[klass].prototype=document.createElement(tagName).__proto__;
 return window[klass];
 }
 if (F.ElementExtensions){
 copy(Element.Methods, HTMLElement.prototype);
 copy(Element.Methods.Simulated, HTMLElement.prototype, 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(){
 var dimensions={ };
 var B=Prototype.Browser;
 $w('width height').each(function(d){
 var D=d.capitalize();
 dimensions[d]=(B.WebKit && !document.evaluate)?self['inner'+D] :
 (B.Opera)?document.body['client'+D] :document.documentElement['client'+D];
 });
 return dimensions;
 },
 getWidth:function(){
 return this.getDimensions().width;
 },
 getHeight:function(){
 return this.getDimensions().height;
 },
 getScrollOffsets:function(){
 return Element._returnOffset(
 window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
 window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
 }
};
var Selector=Class.create({
 initialize:function(expression){
 this.expression=expression.strip();
 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(this.expression))
 return false;
 return true;
 },
 compileMatcher:function(){
 if (this.shouldUseXPath())
 return this.compileXPathMatcher();
 var e=this.expression, ps=Selector.patterns, h=Selector.handlers,
 c=Selector.criteria, le, p, m;
 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 in ps){
 p=ps[i];
 if (m=e.match(p)){
 this.matcher.push(Object.isFunction(c[i])?c[i](m) :
 	 new Template(c[i]).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;
 if (Selector._cache[e]){
 this.xpath=Selector._cache[e]; return;
 }
 this.matcher=['.//*'];
 while (e && le != e && (/\S/).test(e)){
 le=e;
 for (var i in ps){
 if (m=e.match(ps[i])){
 this.matcher.push(Object.isFunction(x[i])?x[i](m) :
 new Template(x[i]).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;
 if (this.xpath) return document._getElementsByXPath(this.xpath, root);
 return this.matcher(root);
 },
 match:function(element){
 this.tokens=[];
 var e=this.expression, ps=Selector.patterns, as=Selector.assertions;
 var le, p, m;
 while (e && le !== e && (/\S/).test(e)){
 le=e;
 for (var i in ps){
 p=ps[i];
 if (m=e.match(p)){
 if (as[i]){
 this.tokens.push([i, 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()+">";
 }
});
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 or translate(text(), ' \t\r\n', '')='')]",
 'checked':"[@checked]",
 'disabled':"[@disabled]",
 'enabled':"[not(@disabled)]",
 'not':function(m){
 var e=m[6], p=Selector.patterns,
 x=Selector.xpath, le, v;

 var exclusion=[];
 while (e && le != e && (/\S/).test(e)){
 le=e;
 for (var i in p){
 if (m=e.match(p[i])){
 v=Object.isFunction(x[i])?x[i](m) :new Template(x[i]).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:{
 laterSibling:/^\s*~\s*/,
 child:/^\s*>\s*/,
 adjacent:/^\s*\+\s*/,
 descendant:/^\s/,
 tagName:/^\s*(\*|[\w\-]+)(\b|$)?/,
 id:/^#([\w\-\*]+)(\b|$)/,
 className:/^\.([\w\-\*]+)(\b|$)/,
 pseudo:
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
 attrPresence:/^\[([\w]+)\]/,
 attr:/\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
 },
 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){
 // fastlane for ordinary descendant combinators
 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++){
 // IE treats comments as element nodes
 if (node.tagName=='!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) 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) 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.startsWith(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, {
 // IE returns comment nodes on getElementsByTagName("*").
 // Filter them out.
 concat:function(a, b){
 for (var i=0, node; node=b[i]; i++)
 if (node.tagName !== "!") a.push(node);
 return a;
 },

 // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
 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 != 'submit' || (!submitted &&
 submit !== false && (!submit || key==submit) && (submitted=true)))){
 if (key in result){
 // a key is already present; construct an array of values
 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.blur();
 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, index){
 if (Object.isUndefined(index))
 return this[element.type=='select-one' ?
 'selectOne' :'selectMany'](element);
 else {
 var opt, value, single=!Object.isArray(index);
 for (var i=0, length=element.length; i < length; i++){
 opt=element.options[i];
 value=this.optionValue(opt);
 if (single){
 if (value==index){
 opt.selected=true;
 return;
 }
 }
 else opt.selected=index.include(value);
 }
 }
 },

 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){
 // extend element because hasAttribute may not be native
 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);
 }
});
if (!window.Event) var Event={ };

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,
 KEY_INSERT:45,

 cache:{ },

 relatedTarget:function(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);
 }
});

Event.Methods=(function(){
 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);
 };
 }

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

 element:function(event){
 var node=Event.extend(event).target;
 return Element.extend(node.nodeType==Node.TEXT_NODE?node.parentNode :node);
 },

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

 pointer:function(event){
 return {
 x:event.pageX || (event.clientX +
 (document.documentElement.scrollLeft || document.body.scrollLeft)),
 y:event.pageY || (event.clientY +
 (document.documentElement.scrollTop || document.body.scrollTop))
 };
 },

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

 stop:function(event){
 Event.extend(event);
 event.preventDefault();
 event.stopPropagation();
 event.stopped=true;
 }
 };
})();

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

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

 return 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:Event.relatedTarget(event),
 pageX:pointer.x,
 pageY:pointer.y
 });
 return Object.extend(event, methods);
 };

 } else {
 Event.prototype=Event.prototype || document.createEvent("HTMLEvents").__proto__;
 Object.extend(Event.prototype, methods);
 return Prototype.K;
 }
})();

Object.extend(Event, (function(){
 var cache=Event.cache;

 function getEventID(element){
 if (element._prototypeEventID) return element._prototypeEventID[0];
 arguments.callee.id=arguments.callee.id || 1;
 return element._prototypeEventID=[++arguments.callee.id];
 }

 function getDOMEventName(eventName){
 if (eventName && eventName.include(':')) return "dataavailable";
 return eventName;
 }

 function getCacheForID(id){
 return cache[id]=cache[id] || { };
 }

 function getWrappersForEventName(id, eventName){
 var c=getCacheForID(id);
 return c[eventName]=c[eventName] || [];
 }

 function createWrapper(element, eventName, handler){
 var id=getEventID(element);
 var c=getWrappersForEventName(id, eventName);
 if (c.pluck("handler").include(handler)) return false;

 var wrapper=function(event){
 if (!Event || !Event.extend ||
 (event.eventName && event.eventName != eventName))
 return false;

 Event.extend(event);
 handler.call(element, event);
 };

 wrapper.handler=handler;
 c.push(wrapper);
 return wrapper;
 }

 function findWrapper(id, eventName, handler){
 var c=getWrappersForEventName(id, eventName);
 return c.find(function(wrapper){ return wrapper.handler==handler });
 }

 function destroyWrapper(id, eventName, handler){
 var c=getCacheForID(id);
 if (!c[eventName]) return false;
 c[eventName]=c[eventName].without(findWrapper(id, eventName, handler));
 }

 function destroyCache(){
 for (var id in cache)
 for (var eventName in cache[id])
 cache[id][eventName]=null;
 }

 if (window.attachEvent){
 window.attachEvent("onunload", destroyCache);
 }

 return {
 observe:function(element, eventName, handler){
 element=$(element);
 var name=getDOMEventName(eventName);

 var wrapper=createWrapper(element, eventName, handler);
 if (!wrapper) return element;

 if (element.addEventListener){
 element.addEventListener(name, wrapper, false);
 } else {
 element.attachEvent("on"+name, wrapper);
 }

 return element;
 },

 stopObserving:function(element, eventName, handler){
 element=$(element);
 var id=getEventID(element), name=getDOMEventName(eventName);

 if (!handler && eventName){
 getWrappersForEventName(id, eventName).each(function(wrapper){
 element.stopObserving(eventName, wrapper.handler);
 });
 return element;

 } else if (!eventName){
 Object.keys(getCacheForID(id)).each(function(eventName){
 element.stopObserving(eventName);
 });
 return element;
 }

 var wrapper=findWrapper(id, eventName, handler);
 if (!wrapper) return element;

 if (element.removeEventListener){
 element.removeEventListener(name, wrapper, false);
 } else {
 element.detachEvent("on"+name, wrapper);
 }

 destroyWrapper(id, eventName, handler);

 return element;
 },

 fire:function(element, eventName, memo){
 element=$(element);
 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="ondataavailable";
 }

 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);

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

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

(function(){
 var timer;

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

 if (document.addEventListener){
 if (Prototype.Browser.WebKit){
 timer=window.setInterval(function(){
 if (/loaded|complete/.test(document.readyState))
 fireContentLoadedEvent();
 }, 0);

 Event.observe(window, "load", fireContentLoadedEvent);

 } else {
 document.addEventListener("DOMContentLoaded",
 fireContentLoadedEvent, false);
 }

 } else {
 document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
 $("__onDOMContentLoaded").onreadystatechange=function(){
 if (this.readyState=="complete"){
 this.onreadystatechange=null;
 fireContentLoadedEvent();
 }
 };
 }
})();

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);
Element.addMethods();