var Tips={tips:[],zIndex:1200,
	add:function(tip){this.tips.push(tip);},
	remove:function(element){var tip=this.tips.find(function(t){
		return t.element==$(element);
	});
	
	if(!tip)return;
	
	this.tips=this.tips.reject(function(t){return t==tip;});
	tip.deactivate();
	
	if(tip.tooltip)
		tip.wrapper.remove();
		
	if(tip.underlay)
		tip.underlay.remove();
	}
}

var Tip=Class.create();

Tip.prototype={
	initialize:function(element,content){
		this.element=$(element);
		Tips.remove(this.element);
		this.content=content;
		this.options=Object.extend({className:'tooltip',duration:0.3,effect:false,hook:false,
			offset:(arguments[2]&&arguments[2].hook)?{x:0,y:0}:{x:16,y:16},fixed:false,
			target:this.element,title:false,viewport:true},arguments[2]||{});
		this.target=$(this.options.target);
		if(this.options.hook){this.options.fixed=true;this.options.viewport=false;}
		if(this.options.effect){
			this.queue={position:'end',limit:1,scope:''}
			var c="0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
			for(var i=0;i<6;i++){var r=Math.floor(Math.random()*c.length);this.queue.scope+=c.substring(r,r+1);}
		}
		this.buildWrapper();
		Tips.add(this);
		this.activate();
	},
	
	activate:function(){
		this.eventShow=this.showTip.safeBind(this);
		this.eventHide=this.hideTip.safeBind(this);
		this.element.observe('mousemove',this.eventShow);
		this.element.observe('mouseout',this.eventHide);
	},
	deactivate:function(){
		this.element.stopObserving('mousemove',this.eventShow);
		this.element.stopObserving('mouseout',this.eventHide);
	},
	buildWrapper:function(){
		this.wrapper=document.createElement('div');
		Element.setStyle(this.wrapper,{position:'absolute',zIndex:Tips.zIndex+1,display:'none'});
		if(Prototype.Browser.IE){
			this.underlay=document.createElement('iframe');
			this.underlay.src='javascript:;';
			Element.setStyle(this.underlay,{position:'absolute',display:'none',border:0,margin:0,opacity:0.01,padding:0,background:'none',zIndex:Tips.zIndex});}},
			buildTip:function(){
				if(Prototype.Browser.IE)
					document.body.appendChild(this.underlay);
				this.tooltip=this.wrapper.appendChild(document.createElement('div'));
				this.tooltip.className=this.options.className;
				this.tooltip.style.position='relative';
				if(this.options.title){
					this.title=this.tooltip.appendChild(document.createElement('div'));
					this.title.className='title';
					Element.update(this.title,this.options.title);
				}
				this.tip=this.tooltip.appendChild(document.createElement('div'));
				this.tip.className='content';
				Element.update(this.tip,this.content);
				document.body.appendChild(this.wrapper);
				var w=this.wrapper.getDimensions();
				this.wrapper.setStyle({width:w.width+'px',height:w.height+'px'});
				if(Prototype.Browser.IE)
					this.underlay.setStyle({width:w.width+'px',height:w.height+'px'});
				Element.hide(this.tooltip);
			},
			showTip:function(event){
				if(!this.tooltip)
					this.buildTip();
				this.positionTip(event);
				if(this.wrapper.visible()&&this.options.effect!='appear')
					return;
				if(Prototype.Browser.IE)
					this.underlay.show();
				this.wrapper.show();
				if(!this.options.effect){
					this.tooltip.show();
				}else{
					if(this.activeEffect)
						Effect.Queues.get(this.queue.scope).remove(this.activeEffect);
						this.activeEffect=Effect[Effect.PAIRS[this.options.effect][0]](this.tooltip,{duration:this.options.duration,queue:this.queue});
				}
			},
			hideTip:function(event){
				if(!this.wrapper.visible())
					return;
				if(!this.options.effect){
					if(Prototype.Browser.IE){this.underlay.hide();}
					this.tooltip.hide();
					this.wrapper.hide();
				}
				else{
					if(this.activeEffect)
						Effect.Queues.get(this.queue.scope).remove(this.activeEffect);
						this.activeEffect=Effect[Effect.PAIRS[this.options.effect][1]](this.tooltip,{duration:this.options.duration,queue:this.queue,afterFinish:function(){
							if(Prototype.Browser.IE)this.underlay.hide();this.wrapper.hide();}.bind(this)});}},positionTip:function(event){var offset={'left':this.options.offset.x,'top':this.options.offset.y};var targetPosition=Position.cumulativeOffset(this.target);var tipd=this.wrapper.getDimensions();var pos={'left':(this.options.fixed)?targetPosition[0]:Event.pointerX(event),'top':(this.options.fixed)?targetPosition[1]:Event.pointerY(event)}
pos.left+=offset.left;pos.top+=offset.top;
						if(this.options.hook){var dims={'target':this.target.getDimensions(),'tip':tipd}
						var hooks={'target':Position.cumulativeOffset(this.target),'tip':Position.cumulativeOffset(this.target)}
for(var z in hooks){switch(this.options.hook[z]){case'topRight':hooks[z][0]+=dims[z].width;break;case'bottomLeft':hooks[z][1]+=dims[z].height;break;case'bottomRight':hooks[z][0]+=dims[z].width;hooks[z][1]+=dims[z].height;break;}}
pos.left+=-1*(hooks.tip[0]-hooks.target[0]);pos.top+=-1*(hooks.tip[1]-hooks.target[1]);}
if(!this.options.fixed&&this.element!==this.target){var elementPosition=Position.cumulativeOffset(this.element);pos.left+=-1*(elementPosition[0]-targetPosition[0]);pos.top+=-1*(elementPosition[1]-targetPosition[1]);}
if(!this.options.fixed&&this.options.viewport){var scroll=this.getScrollOffsets();var viewport=this.viewportSize();var pair={'left':'width','top':'height'};for(var z in pair){if((pos[z]+tipd[pair[z]]-scroll[z])>viewport[pair[z]]){pos[z]=pos[z]-tipd[pair[z]]-2*offset[z];}}}
this.wrapper.setStyle({left:pos.left+'px',top:pos.top+'px'});if(Prototype.Browser.IE)this.underlay.setStyle({left:pos.left+'px',top:pos.top+'px'});},viewportWidth:function(){if(Prototype.Browser.Opera)return document.body.clientWidth;return document.documentElement.clientWidth;},viewportHeight:function(){if(Prototype.Browser.Opera)return document.body.clientHeight;if(Prototype.Browser.WebKit)return this.innerHeight;return document.documentElement.clientHeight;},viewportSize:function(){return{'height':this.viewportHeight(),'width':this.viewportWidth()};},getScrollLeft:function(){return this.pageXOffset||document.documentElement.scrollLeft;},getScrollTop:function(){return this.pageYOffset||document.documentElement.scrollTop;},getScrollOffsets:function(){return{'left':this.getScrollLeft(),'top':this.getScrollTop()}}}
Function.prototype.safeBind=function(){var __method=this,args=$A(arguments),object=args.shift();return function(){if(typeof $A=='function')
return __method.apply(object,args.concat($A(arguments)));}}