var Tooltip = {
    followMouse: true,
    offX: 8,
    offY: 12,
    tipID: "tipDiv",
    showDelay: 100,
    hideDelay: 200,
	ready:false,
	timer:null,
	tip:null,
	init:function()
	{
		if(document.createElement&&document.body&&typeof document.body.appendChild!="undefined")
		{
			if(!document.getElementById(this.tipID))
			{
				var el=document.createElement("DIV");
				el.id=this.tipID;
				document.body.appendChild(el);
			}
			this.ready=true;
		}
	},
	show:function(e,msg)
	{
		if(this.timer)
		{
			clearTimeout(this.timer);
			this.timer=0;
		}
		if(!this.ttready)return;
		
		this.tip=document.getElementById(this.tipID);
		
		if(this.followMouse)
			dw_event.add(document,"mousemove",this.trackMouse,true);
		
		this.writeTip("");
		this.writeTip(msg);
		viewport.getAll();
		this.positionTip(e);
		
		this.timer=setTimeout("Tooltip.toggleVis('"+this.tipID+"', 'visible')",this.showDelay);
		
	},
	writeTip:function(msg)
	{
		if(this.tip&&typeof this.tip.innerHTML!="undefined")
		this.tip.innerHTML=msg;},positionTip:function(e)
		{
			if(this.tip&&this.tip.style)
			{
				var x=e.pageX?e.pageX:e.clientX+viewport.scrollX;
				var y=e.pageY?e.pageY:e.clientY+viewport.scrollY;
				
				if(x+this.tip.offsetWidth+this.offX>viewport.width+viewport.scrollX)
				{
					x=x-this.tip.offsetWidth-this.offX;
					if(x<0)
						x=0;
				}
				else 
					x=x+this.offX;
					
				if(y+this.tip.offsetHeight+this.offY>viewport.height+viewport.scrollY)
				{
					y=y-this.tip.offsetHeight-this.offY;
					
					if(y<viewport.scrollY)
						y=viewport.height+viewport.scrollY-this.tip.offsetHeight;
				}
				else y=y+this.offY;this.tip.style.left=x+"px";this.tip.style.top=y+"px";
			}
	},
	hide:function()
	{
		if(this.timer)
		{
			clearTimeout(this.timer);
			this.timer=0;
		}
		this.timer=setTimeout("Tooltip.toggleVis('"+this.tipID+"', 'hidden')",this.hideDelay);
		
		if(this.followMouse)
			dw_event.remove(document,"mousemove",this.trackMouse,true);
			this.tip=null;
	},
	toggleVis:function(id,vis)
	{
		var el=document.getElementById(id);
		if(el)el.style.visibility=vis;
	},
	trackMouse:function(e)
	{
		e=dw_event.DOMit(e);
		Tooltip.positionTip(e);
	}
};

Tooltip.ttready=true;