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$(a).innerHTML.match(/^\s*$/)},descendantOf:function(a,b){a=$(a),b=$(b);while(a=a.parentNode)if(a==b)return true;return false},scrollTo:function(a){a=$(a);var b=Position.cumulativeOffset(a);window.scrollTo(b[0],b[1]);return a},getStyle:function(b,c){b=$(b);if(["float","cssFloat"].include(c))c=typeof b.style.styleFloat!="undefined"?"styleFloat":"cssFloat";c=c.camelize();var a=b.style[c];if(!a)if(document.defaultView&&document.defaultView.getComputedStyle){var d=document.defaultView.getComputedStyle(b,null);a=d?d[c]:null}else if(b.currentStyle)a=b.currentStyle[c];if(a=="auto"&&["width","height"].include(c)&&b.getStyle("display")!="none")a=b["offset"+c.capitalize()]+"px";if(window.opera&&["left","top","right","bottom"].include(c))if(Element.getStyle(b,"position")=="static")a="auto";if(c=="opacity"){if(a)return parseFloat(a);if(a=(b.getStyle("filter")||"").match(/alpha\(opacity=(.*)\)/))if(a[1])return parseFloat(a[1])/100;return 1}return a=="auto"?null:a},setStyle:function(a,d){a=$(a);for(var c in d){var b=d[c];if(c=="opacity")if(b==1){b=/Gecko/.test(navigator.userAgent)&&!/Konqueror|Safari|KHTML/.test(navigator.userAgent)?.999999:1;if(/MSIE/.test(navigator.userAgent)&&!window.opera)a.style.filter=a.getStyle("filter").replace(/alpha\([^\)]*\)/gi,"")}else if(b==""){if(/MSIE/.test(navigator.userAgent)&&!window.opera)a.style.filter=a.getStyle("filter").replace(/alpha\([^\)]*\)/gi,"")}else{if(b<1e-5)b=0;if(/MSIE/.test(navigator.userAgent)&&!window.opera)a.style.filter=a.getStyle("filter").replace(/alpha\([^\)]*\)/gi,"")+"alpha(opacity="+b*100+")"}else if(["float","cssFloat"].include(c))c=typeof a.style.styleFloat!="undefined"?"styleFloat":"cssFloat";a.style[c.camelize()]=b}return a},getDimensions:function(b){b=$(b);var c=$(b).getStyle("display");if(c!="none"&&c!=null)return {width:b.offsetWidth,height:b.offsetHeight};var a=b.style,d=a.visibility,e=a.position,f=a.display;a.visibility="hidden";a.position="absolute";a.display="block";var h=b.clientWidth,g=b.clientHeight;a.display=f;a.position=e;a.visibility=d;return {width:h,height:g}},makePositioned:function(a){a=$(a);var b=Element.getStyle(a,"position");if(b=="static"||!b){a._madePositioned=true;a.style.position="relative";if(window.opera){a.style.top=0;a.style.left=0}}return a},undoPositioned:function(a){a=$(a);if(a._madePositioned){a._madePositioned=undefined;a.style.position=a.style.top=a.style.left=a.style.bottom=a.style.right=""}return a},makeClipping:function(a){a=$(a);if(a._overflow)return a;a._overflow=a.style.overflow||"auto";if((Element.getStyle(a,"overflow")||"visible")!="hidden")a.style.overflow="hidden";return a},undoClipping:function(a){a=$(a);if(!a._overflow)return a;a.style.overflow=a._overflow=="auto"?"":a._overflow;a._overflow=null;return a}};Object.extend(Element.Methods,{childOf:Element.Methods.descendantOf});Element._attributeTranslations={};Element._attributeTranslations.names={colspan:"colSpan",rowspan:"rowSpan",valign:"vAlign",datetime:"dateTime",accesskey:"accessKey",tabindex:"tabIndex",enctype:"encType",maxlength:"maxLength",readonly:"readOnly",longdesc:"longDesc"};Element._attributeTranslations.values={_getAttr:function(b,a){return b.getAttribute(a,2)},_flag:function(b,a){return $(b).hasAttribute(a)?a:null},style:function(a){return a.style.cssText.toLowerCase()},title:function(b){var a=b.getAttributeNode("title");return a.specified?a.nodeValue:null}};Object.extend(Element._attributeTranslations.values,{href:Element._attributeTranslations.values._getAttr,src:Element._attributeTranslations.values._getAttr,disabled:Element._attributeTranslations.values._flag,checked:Element._attributeTranslations.values._flag,readonly:Element._attributeTranslations.values._flag,multiple:Element._attributeTranslations.values._flag});Element.Methods.Simulated={hasAttribute:function(b,a){var c=Element._attributeTranslations;a=c.names[a]||a;return $(b).getAttributeNode(a).specified}};if(document.all&&!window.opera)Element.Methods.update=function(a,b){a=$(a);b=typeof b=="undefined"?"":b.toString();var d=a.tagName.toUpperCase();if(["THEAD","TBODY","TR","TD"].include(d)){var c=document.createElement("div");switch(d){case "THEAD":case "TBODY":c.innerHTML="<table><tbody>"+b.stripScripts()+"</tbody></table>";depth=2;break;case "TR":c.innerHTML="<table><tbody><tr>"+b.stripScripts()+"</tr></tbody></table>";depth=3;break;case "TD":c.innerHTML="<table><tbody><tr><td>"+b.stripScripts()+"</td></tr></tbody></table>";depth=4}$A(a.childNodes).each(function(b){a.removeChild(b)});depth.times(function(){c=c.firstChild});$A(c.childNodes).each(function(b){a.appendChild(b)})}else a.innerHTML=b.stripScripts();setTimeout(function(){b.evalScripts()},10);return a};Object.extend(Element,Element.Methods);var _nativeExtensions=false;/Konqueror|Safari|KHTML/.test(navigator.userAgent)&&["","Form","Input","TextArea","Select"].each(function(a){var b="HTML"+a+"Element";if(window[b])return;var c=window[b]={};c.prototype=document.createElement(a?a.toLowerCase():"div").__proto__});Element.addMethods=function(b){Object.extend(Element.Methods,b||{});function a(d,c,a){a=a||false;var e=Element.extend.cache;for(var b in d){var f=d[b];if(!a||!(b in c))c[b]=e.findOrStore(f)}}if(typeof HTMLElement!="undefined"){a(Element.Methods,HTMLElement.prototype);a(Element.Methods.Simulated,HTMLElement.prototype,true);a(Form.Methods,HTMLFormElement.prototype);[HTMLInputElement,HTMLTextAreaElement,HTMLSelectElement].each(function(b){a(Form.Element.Methods,b.prototype)});_nativeExtensions=true}};var Toggle={};Toggle.display=Element.toggle;Abstract.Insertion=function(a){this.adjacency=a};Abstract.Insertion.prototype={initialize:function(c,a){this.element=$(c);this.content=a.stripScripts();if(this.adjacency&&this.element.insertAdjacentHTML)try{this.element.insertAdjacentHTML(this.adjacency,this.content)}catch(b){var d=this.element.tagName.toUpperCase();if(["TBODY","TR"].include(d))this.insertContent(this.contentFromAnonymousTable());else throw b}else{this.range=this.element.ownerDocument.createRange();this.initializeRange&&this.initializeRange();this.insertContent([this.range.createContextualFragment(this.content)])}setTimeout(function(){a.evalScripts()},10)},contentFromAnonymousTable:function(){var a=document.createElement("div");a.innerHTML="<table><tbody>"+this.content+"</tbody></table>";return $A(a.childNodes[0].childNodes[0].childNodes)}};var Insertion={};Insertion.Before=Class.create();Insertion.Before.prototype=Object.extend(new Abstract.Insertion("beforeBegin"),{initializeRange:function(){this.range.setStartBefore(this.element)},insertContent:function(a){a.each(function(a){this.element.parentNode.insertBefore(a,this.element)}.bind(this))}});Insertion.Top=Class.create();Insertion.Top.prototype=Object.extend(new Abstract.Insertion("afterBegin"),{initializeRange:function(){this.range.selectNodeContents(this.element);this.range.collapse(true)},insertContent:function(a){a.reverse(false).each(function(a){this.element.insertBefore(a,this.element.firstChild)}.bind(this))}});Insertion.Bottom=Class.create();Insertion.Bottom.prototype=Object.extend(new Abstract.Insertion("beforeEnd"),{initializeRange:function(){this.range.selectNodeContents(this.element);this.range.collapse(this.element)},insertContent:function(a){a.each(function(a){this.element.appendChild(a)}.bind(this))}});Insertion.After=Class.create();Insertion.After.prototype=Object.extend(new Abstract.Insertion("afterEnd"),{initializeRange:function(){this.range.setStartAfter(this.element)},insertContent:function(a){a.each(function(a){this.element.parentNode.insertBefore(a,this.element.nextSibling)}.bind(this))}});Element.ClassNames=Class.create();Element.ClassNames.prototype={initialize:function(a){this.element=$(a)},_each:function(a){this.element.className.split(/\s+/).select(function(a){return a.length>0})._each(a)},"set":function(a){this.element.className=a},add:function(a){if(this.include(a))return;this.set($A(this).concat(a).join(" "))},remove:function(a){if(!this.include(a))return;this.set($A(this).without(a).join(" "))},toString:function(){return $A(this).join(" ")}};Object.extend(Element.ClassNames.prototype,Enumerable);var Selector=Class.create();Selector.prototype={initialize:function(a){this.params={classNames:[]};this.expression=a.toString().strip();this.parseExpression();this.compileMatcher()},parseExpression:function(){function e(a){throw"Parse error in selector: "+a}this.expression==""&&e("empty expression");var c=this.params,b=this.expression,a,f,d,g;while(a=b.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)){c.attributes=c.attributes||[];c.attributes.push({name:a[2],operator:a[3],value:a[4]||a[5]||""});b=a[1]}if(b=="*")return this.params.wildcard=true;while(a=b.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)){f=a[1],d=a[2],g=a[3];switch(f){case "#":c.id=d;break;case ".":c.classNames.push(d);break;case "":case undefined:c.tagName=d.toUpperCase();break;default:e(b.inspect())}b=g}b.length>0&&e(b.inspect())},buildMatchExpression:function(){var c=this.params,a=[],b;c.wildcard&&a.push("true");(b=c.id)&&a.push('element.readAttribute("id") == '+b.inspect());(b=c.tagName)&&a.push("element.tagName.toUpperCase() == "+b.inspect());if((b=c.classNames).length>0)for(var d=0,e=b.length;d<e;d++)a.push("element.hasClassName("+b[d].inspect()+")");(b=c.attributes)&&b.each(function(b){var c="element.readAttribute("+b.name.inspect()+")",d=function(a){return c+" && "+c+".split("+a.inspect()+")"};switch(b.operator){case "=":a.push(c+" == "+b.value.inspect());break;case "~=":a.push(d(" ")+".include("+b.value.inspect()+")");break;case "|=":a.push(d("-")+".first().toUpperCase() == "+b.value.toUpperCase().inspect());break;case "!=":a.push(c+" != "+b.value.inspect());break;case "":case undefined:a.push("element.hasAttribute("+b.name.inspect()+")");break;default:throw"Unknown operator "+b.operator+" in selector"}});return a.join(" && ")},compileMatcher:function(){this.match=new Function("element","if (!element.tagName) return false;       element = $(element);       return "+this.buildMatchExpression())},findElements:function(b){var a;if(a=$(this.params.id))if(this.match(a))if(!b||Element.childOf(a,b))return [a];b=(b||document).getElementsByTagName(this.params.tagName||"*");for(var d=[],c=0,e=b.length;c<e;c++)this.match(a=b[c])&&d.push(Element.extend(a));return d},toString:function(){return this.expression}};Object.extend(Selector,{matchElements:function(c,b){var a=new Selector(b);return c.select(a.match.bind(a)).map(Element.extend)},findElement:function(c,a,b){if(typeof a=="number")b=a,a=false;return Selector.matchElements(c,a||"*")[b||0]},findChildElements:function(b,a){return a.map(function(a){return a.match(/[^\s"]+(?:"[^"]*"[^\s"]+)*/g).inject([null],function(c,d){var a=new Selector(d);return c.inject([],function(c,d){return c.concat(a.findElements(d||b))})})}).flatten()}});function $$(){return Selector.findChildElements(document,$A(arguments))}var Form={reset:function(a){$(a).reset();return a},serializeElements:function(b,c){var a=b.inject({},function(a,c){if(!c.disabled&&c.name){var b=c.name,d=$(c).getValue();if(d!=undefined)if(a[b]){if(a[b].constructor!=Array)a[b]=[a[b]];a[b].push(d)}else a[b]=d}return a});return c?a:Hash.toQueryString(a)}};Form.Methods={serialize:function(b,a){return Form.serializeElements(Form.getElements(b),a)},getElements:function(a){return $A($(a).getElementsByTagName("*")).inject([],function(a,b){Form.Element.Serializers[b.tagName.toLowerCase()]&&a.push(Element.extend(b));return a})},getInputs:function(d,a,e){d=$(d);var b=d.getElementsByTagName("input");if(!a&&!e)return $A(b).map(Element.extend);for(var f=0,g=[],h=b.length;f<h;f++){var c=b[f];if(a&&c.type!=a||e&&c.name!=e)continue;g.push(Element.extend(c))}return g},disable:function(a){a=$(a);a.getElements().each(function(a){a.blur();a.disabled="true"});return a},enable:function(a){a=$(a);a.getElements().each(function(a){a.disabled=""});return a},findFirstElement:function(a){return $(a).getElements().find(function(a){return a.type!="hidden"&&!a.disabled&&["input","select","textarea"].include(a.tagName.toLowerCase())})},focusFirstElement:function(a){a=$(a);a.findFirstElement().activate();return a}};Object.extend(Form,Form.Methods);Form.Element={focus:function(a){$(a).focus();return a},select:function(a){$(a).select();return a}};Form.Element.Methods={serialize:function(a){a=$(a);if(!a.disabled&&a.name){var b=a.getValue();if(b!=undefined){var c={};c[a.name]=b;return Hash.toQueryString(c)}}return ""},getValue:function(a){a=$(a);var b=a.tagName.toLowerCase();return Form.Element.Serializers[b](a)},clear:function(a){$(a).value="";return a},present:function(a){return $(a).value!=""},activate:function(a){a=$(a);a.focus();a.select&&(a.tagName.toLowerCase()!="input"||!["button","reset","submit"].include(a.type))&&a.select();return a},disable:function(a){a=$(a);a.disabled=true;return a},enable:function(a){a=$(a);a.blur();a.disabled=false;return a}};Object.extend(Form.Element,Form.Element.Methods);var Field=Form.Element,$F=Form.Element.getValue;Form.Element.Serializers={input:function(a){switch(a.type.toLowerCase()){case "checkbox":case "radio":return Form.Element.Serializers.inputSelector(a);default:return Form.Element.Serializers.textarea(a)}},inputSelector:function(a){return a.checked?a.value:null},textarea:function(a){return a.value},select:function(a){return this[a.type=="select-one"?"selectOne":"selectMany"](a)},selectOne:function(a){var b=a.selectedIndex;return b>=0?this.optionValue(a.options[b]):null},selectMany:function(b){var d,c=b.length;if(!c)return null;for(var a=0,d=[];a<c;a++){var e=b.options[a];e.selected&&d.push(this.optionValue(e))}return d},optionValue:function(a){return Element.extend(a).hasAttribute("value")?a.value:a.text}};Abstract.TimedObserver=function(){};Abstract.TimedObserver.prototype={initialize:function(c,a,b){this.frequency=a;this.element=$(c);this.callback=b;this.lastValue=this.getValue();this.registerCallback()},registerCallback:function(){setInterval(this.onTimerEvent.bind(this),this.frequency*1e3)},onTimerEvent:function(){var a=this.getValue(),b="string"==typeof this.lastValue&&"string"==typeof a?this.lastValue!=a:String(this.lastValue)!=String(a);if(b){this.callback(this.element,a);this.lastValue=a}}};Form.Element.Observer=Class.create();Form.Element.Observer.prototype=Object.extend(new Abstract.TimedObserver,{getValue:function(){return Form.Element.getValue(this.element)}});Form.Observer=Class.create();Form.Observer.prototype=Object.extend(new Abstract.TimedObserver,{getValue:function(){return Form.serialize(this.element)}});Abstract.EventObserver=function(){};Abstract.EventObserver.prototype={initialize:function(b,a){this.element=$(b);this.callback=a;this.lastValue=this.getValue();if(this.element.tagName.toLowerCase()=="form")this.registerFormCallbacks();else this.registerCallback(this.element)},onElementEvent:function(){var a=this.getValue();if(this.lastValue!=a){this.callback(this.element,a);this.lastValue=a}},registerFormCallbacks:function(){Form.getElements(this.element).each(this.registerCallback.bind(this))},registerCallback:function(a){if(a.type)switch(a.type.toLowerCase()){case "checkbox":case "radio":Event.observe(a,"click",this.onElementEvent.bind(this));break;default:Event.observe(a,"change",this.onElementEvent.bind(this))}}};Form.Element.EventObserver=Class.create();Form.Element.EventObserver.prototype=Object.extend(new Abstract.EventObserver,{getValue:function(){return Form.Element.getValue(this.element)}});Form.EventObserver=Class.create();Form.EventObserver.prototype=Object.extend(new Abstract.EventObserver,{getValue:function(){return Form.serialize(this.element)}});if(!window.Event)var Event={};Object.extend(Event,{KEY_BACKSPACE:8,KEY_TAB:9,KEY_RETURN:13,KEY_ESC:27,KEY_LEFT:37,KEY_UP:38,KEY_RIGHT:39,KEY_DOWN:40,KEY_DELETE:46,KEY_HOME:36,KEY_END:35,KEY_PAGEUP:33,KEY_PAGEDOWN:34,element:function(a){return a.target||a.srcElement},isLeftClick:function(a){return a.which&&a.which==1||a.button&&a.button==1},pointerX:function(a){return a.pageX||a.clientX+(document.documentElement.scrollLeft||document.body.scrollLeft)},pointerY:function(a){return a.pageY||a.clientY+(document.documentElement.scrollTop||document.body.scrollTop)},stop:function(a){if(a.preventDefault){a.preventDefault();a.stopPropagation()}else{a.returnValue=false;a.cancelBubble=true}},findElement:function(c,b){var a=Event.element(c);while(a.parentNode&&(!a.tagName||a.tagName.toUpperCase()!=b.toUpperCase()))a=a.parentNode;return a},observers:false,_observeAndCache:function(a,c,b,d){if(!this.observers)this.observers=[];if(a.addEventListener){this.observers.push([a,c,b,d]);a.addEventListener(c,b,d)}else if(a.attachEvent){this.observers.push([a,c,b,d]);a.attachEvent("on"+c,b)}},unloadCache:function(){if(!Event.observers)return;for(var a=0,b=Event.observers.length;a<b;a++){Event.stopObserving.apply(this,Event.observers[a]);Event.observers[a][0]=null}Event.observers=false},observe:function(a,c,d,b){a=$(a);b=b||false;if(c=="keypress"&&(navigator.appVersion.match(/Konqueror|Safari|KHTML/)||a.attachEvent))c="keydown";Event._observeAndCache(a,c,d,b)},stopObserving:function(a,b,d,c){a=$(a);c=c||false;if(b=="keypress"&&(navigator.appVersion.match(/Konqueror|Safari|KHTML/)||a.detachEvent))b="keydown";if(a.removeEventListener)a.removeEventListener(b,d,c);else if(a.detachEvent)try{a.detachEvent("on"+b,d)}catch(e){}}});navigator.appVersion.match(/\bMSIE\b/)&&Event.observe(window,"unload",Event.unloadCache,false);var Position={includeScrollOffsets:false,prepare:function(){this.deltaX=window.pageXOffset||document.documentElement.scrollLeft||document.body.scrollLeft||0;this.deltaY=window.pageYOffset||document.documentElement.scrollTop||document.body.scrollTop||0},realOffset:function(a){var c=0,b=0;do{c+=a.scrollTop||0;b+=a.scrollLeft||0;a=a.parentNode}while(a);return [b,c]},cumulativeOffset:function(a){var c=0,b=0;do{c+=a.offsetTop||0;b+=a.offsetLeft||0;a=a.offsetParent}while(a);return [b,c]},positionedOffset:function(a){var c=0,b=0;do{c+=a.offsetTop||0;b+=a.offsetLeft||0;a=a.offsetParent;if(a){if(a.tagName=="BODY")break;var d=Element.getStyle(a,"position");if(d=="relative"||d=="absolute")break}}while(a);return [b,c]},offsetParent:function(a){if(a.offsetParent)return a.offsetParent;if(a==document.body)return a;while((a=a.parentNode)&&a!=document.body)if(Element.getStyle(a,"position")!="static")return a;return document.body},within:function(a,b,c){if(this.includeScrollOffsets)return this.withinIncludingScrolloffsets(a,b,c);this.xcomp=b;this.ycomp=c;this.offset=this.cumulativeOffset(a);return c>=this.offset[1]&&c<this.offset[1]+a.offsetHeight&&b>=this.offset[0]&&b<this.offset[0]+a.offsetWidth},withinIncludingScrolloffsets:function(a,c,d){var b=this.realOffset(a);this.xcomp=c+b[0]-this.deltaX;this.ycomp=d+b[1]-this.deltaY;this.offset=this.cumulativeOffset(a);return this.ycomp>=this.offset[1]&&this.ycomp<this.offset[1]+a.offsetHeight&&this.xcomp>=this.offset[0]&&this.xcomp<this.offset[0]+a.offsetWidth},overlap:function(b,a){if(!b)return 0;if(b=="vertical")return (this.offset[1]+a.offsetHeight-this.ycomp)/a.offsetHeight;if(b=="horizontal")return (this.offset[0]+a.offsetWidth-this.xcomp)/a.offsetWidth},page:function(d){var c=0,b=0,a=d;do{c+=a.offsetTop||0;b+=a.offsetLeft||0;if(a.offsetParent==document.body)if(Element.getStyle(a,"position")=="absolute")break}while(a=a.offsetParent);a=d;do if(!window.opera||a.tagName=="BODY"){c-=a.scrollTop||0;b-=a.scrollLeft||0}while(a=a.parentNode);return [b,c]},clone:function(c,a){var b=Object.extend({setLeft:true,setTop:true,setWidth:true,setHeight:true,offsetTop:0,offsetLeft:0},arguments[2]||{});c=$(c);var f=Position.page(c);a=$(a);var d=[0,0],e=null;if(Element.getStyle(a,"position")=="absolute"){e=Position.offsetParent(a);d=Position.page(e)}if(e==document.body){d[0]-=document.body.offsetLeft;d[1]-=document.body.offsetTop}if(b.setLeft)a.style.left=f[0]-d[0]+b.offsetLeft+"px";if(b.setTop)a.style.top=f[1]-d[1]+b.offsetTop+"px";if(b.setWidth)a.style.width=c.offsetWidth+"px";if(b.setHeight)a.style.height=c.offsetHeight+"px"},absolutize:function(a){a=$(a);if(a.style.position=="absolute")return;Position.prepare();var b=Position.positionedOffset(a),d=b[1],c=b[0],f=a.clientWidth,e=a.clientHeight;a._originalLeft=c-parseFloat(a.style.left||0);a._originalTop=d-parseFloat(a.style.top||0);a._originalWidth=a.style.width;a._originalHeight=a.style.height;a.style.position="absolute";a.style.top=d+"px";a.style.left=c+"px";a.style.width=f+"px";a.style.height=e+"px"},relativize:function(a){a=$(a);if(a.style.position=="relative")return;Position.prepare();a.style.position="relative";var c=parseFloat(a.style.top||0)-(a._originalTop||0),b=parseFloat(a.style.left||0)-(a._originalLeft||0);a.style.top=c+"px";a.style.left=b+"px";a.style.height=a._originalHeight;a.style.width=a._originalWidth}};if(/Konqueror|Safari|KHTML/.test(navigator.userAgent))Position.cumulativeOffset=function(a){var c=0,b=0;do{c+=a.offsetTop||0;b+=a.offsetLeft||0;if(a.offsetParent==document.body)if(Element.getStyle(a,"position")=="absolute")break;a=a.offsetParent}while(a);return [b,c]};Element.addMethods()