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Class({Implements:Options,options:{},regex:/^(?:(\w+):)?(?:\/\/(?:(?:([^:@\/]*):?([^:@\/]*))?@)?([^:\/?#]*)(?::(\d*))?)?(\.\.?$|(?:[^?#\/]*\/)*)([^?#]*)(?:\?([^#]*))?(?:#(.*))?/,parts:['scheme','user','password','host','port','directory','file','query','fragment'],schemes:{http:80,https:443,ftp:21,rtsp:554,mms:1755,file:0},initialize:function(a,b){this.setOptions(b);var c=this.options.base||URI.base;if(!a)a=c;if(a&&a.parsed)this.parsed=$unlink(a.parsed);else this.set('value',a.href||a.toString(),c?new URI(c):false)},parse:function(a,b){var c=a.match(this.regex);if(!c)return false;c.shift();return this.merge(c.associate(this.parts),b)},merge:function(b,c){if((!b||!b.scheme)&&(!c||!c.scheme))return false;if(c){this.parts.every(function(a){if(b[a])return false;b[a]=c[a]||'';return true})}b.port=b.port||this.schemes[b.scheme.toLowerCase()];b.directory=b.directory?this.parseDirectory(b.directory,c?c.directory:''):'/';return b},parseDirectory:function(b,c){b=(b.substr(0,1)=='/'?'':(c||'/'))+b;if(!b.test(URI.regs.directoryDot))return b;var d=[];b.replace(URI.regs.endSlash,'').split('/').each(function(a){if(a=='..'&&d.length>0)d.pop();else if(a!='.')d.push(a)});return d.join('/')+'/'},combine:function(a){return a.value||a.scheme+'://'+(a.user?a.user+(a.password?':'+a.password:'')+'@':'')+(a.host||'')+(a.port&&a.port!=this.schemes[a.scheme]?':'+a.port:'')+(a.directory||'/')+(a.file||'')+(a.query?'?'+a.query:'')+(a.fragment?'#'+a.fragment:'')},set:function(a,b,c){if(a=='value'){var d=b.match(URI.regs.scheme);if(d)d=d[1];if(d&&!$defined(this.schemes[d.toLowerCase()]))this.parsed={scheme:d,value:b};else this.parsed=this.parse(b,(c||this).parsed)||(d?{scheme:d,value:b}:{value:b})}else if(a=='data'){this.setData(b)}else{this.parsed[a]=b}return this},get:function(a,b){switch(a){case'value':return this.combine(this.parsed,b?b.parsed:false);case'data':return this.getData()}return this.parsed[a]||''},go:function(){document.location.href=this.toString()},toURI:function(){return this},getData:function(a,b){var c=this.get(b||'query');if(!$chk(c))return a?null:{};var d=c.parseQueryString();return a?d[a]:d},setData:function(a,b,c){if(typeof a=='string'){data=this.getData();data[arguments[0]]=arguments[1];a=data}else if(b){a=$merge(this.getData(),a)}return this.set(c||'query',Hash.toQueryString(a))},clearData:function(a){return this.set(a||'query','')}});URI.prototype.toString=URI.prototype.valueOf=function(){return this.get('value')};URI.regs={endSlash:/\/$/,scheme:/^(\w+):/,directoryDot:/\.\/|\.$/};URI.base=new URI(document.getElements('base[href]',true).getLast(),{base:document.location});String.implement({toURI:function(a){return new URI(this,a)}});Fx.Scroll=new Class({Extends:Fx,options:{offset:{x:0,y:0},wheelStops:true},initialize:function(a,b){this.element=this.subject=document.id(a);this.parent(b);var c=this.cancel.bind(this,false);if($type(this.element)!='element')this.element=document.id(this.element.getDocument().body);var d=this.element;if(this.options.wheelStops){this.addEvent('start',function(){d.addEvent('mousewheel',c)},true);this.addEvent('complete',function(){d.removeEvent('mousewheel',c)},true)}},set:function(){var a=Array.flatten(arguments);if(Browser.Engine.gecko)a=[Math.round(a[0]),Math.round(a[1])];this.element.scrollTo(a[0],a[1])},compute:function(a,b,c){return[0,1].map(function(i){return Fx.compute(a[i],b[i],c)})},start:function(x,y){if(!this.check(x,y))return this;var a=this.element.getScrollSize(),scroll=this.element.getScroll(),values={x:x,y:y};for(var z in values){var b=a[z];if($chk(values[z]))values[z]=($type(values[z])=='number')?values[z]:b;else values[z]=scroll[z];values[z]+=this.options.offset[z]}return this.parent([scroll.x,scroll.y],[values.x,values.y])},toTop:function(){return this.start(false,0)},toLeft:function(){return this.start(0,false)},toRight:function(){return this.start('right',false)},toBottom:function(){return this.start(false,'bottom')},toElement:function(a){var b=document.id(a).getPosition(this.element);return this.start(b.x,b.y)},scrollIntoView:function(b,c,d){c=c?$splat(c):['x','y'];var e={};b=document.id(b);var f=b.getPosition(this.element);var g=b.getSize();var h=this.element.getScroll();var i=this.element.getSize();var j={x:f.x+g.x,y:f.y+g.y};['x','y'].each(function(a){if(c.contains(a)){if(j[a]>h[a]+i[a])e[a]=j[a]-i[a];if(f[a]<h[a])e[a]=f[a]}if(e[a]==null)e[a]=h[a];if(d&&d[a])e[a]=e[a]+d[a]},this);if(e.x!=h.x||e.y!=h.y)this.start(e.x,e.y);return this},scrollToCenter:function(b,c,d){c=c?$splat(c):['x','y'];b=$(b);var e={},pos=b.getPosition(this.element),size=b.getSize(),scroll=this.element.getScroll(),containerSize=this.element.getSize(),edge={x:pos.x+size.x,y:pos.y+size.y};['x','y'].each(function(a){if(c.contains(a)){e[a]=pos[a]-(containerSize[a]-size[a])/2}if(e[a]==null)e[a]=scroll[a];if(d&&d[a])e[a]=e[a]+d[a]},this);if(e.x!=scroll.x||e.y!=scroll.y)this.start(e.x,e.y);return this}});var Asset={javascript:function(a,b){b=$extend({onload:$empty,document:document,check:$lambda(true)},b);if(b.onLoad)b.onload=b.onLoad;var c=new Element('script',{src:a,type:'text/javascript'});var d=b.onload.bind(c),check=b.check,doc=b.document;delete b.onload;delete b.check;delete b.document;c.addEvents({load:d,readystatechange:function(){if(['loaded','complete'].contains(this.readyState))d()}}).set(b);if(Browser.Engine.webkit419)var e=(function(){if(!$try(check))return;$clear(e);d()}).periodical(50);return c.inject(doc.head)},css:function(a,b){return new Element('link',$merge({rel:'stylesheet',media:'screen',type:'text/css',href:a},b)).inject(document.head)},image:function(e,f){f=$merge({onload:$empty,onabort:$empty,onerror:$empty},f);var g=new Image();var h=document.id(g)||new Element('img');['load','abort','error'].each(function(a){var b='on'+a;var c=a.capitalize();if(f['on'+c])f[b]=f['on'+c];var d=f[b];delete f[b];g[b]=function(){if(!g)return;if(!h.parentNode){h.width=g.width;h.height=g.height}g=g.onload=g.onabort=g.onerror=null;d.delay(1,h,h);h.fireEvent(a,h,1)}});g.src=h.src=e;if(g&&g.complete)g.onload.delay(1);return h.set(f)},images:function(b,c){c=$merge({onComplete:$empty,onProgress:$empty,onError:$empty,properties:{}},c);b=$splat(b);var d=[];var e=0;return new Elements(b.map(function(a){return Asset.image(a,$extend(c.properties,{onload:function(){c.onProgress.call(this,e,b.indexOf(a));e++;if(e==b.length)c.onComplete()},onerror:function(){c.onError.call(this,e,b.indexOf(a));e++;if(e==b.length)c.onComplete()}}))}))}};