var Showtip = 
{
    followMouse: true,
    offX: 20,
    offY: 24,
    tipID: "tipDiv",
    showDelay: 100,
    hideDelay: 200,
	ready:false,
	timer:null,
	tip:null,

		//init method
		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 method
		,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("Showtip.toggleVis('"+this.tipID+"', 'visible')",this.showDelay);
		}
		//writeTip method
		,writeTip:function(msg){
				if(this.tip&&typeof this.tip.innerHTML!="undefined")this.tip.innerHTML=msg;
		}
		//positionTip method
		,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 method	
		,hide:function(){
				 if(this.timer){
					 clearTimeout(this.timer);
					 this.timer=0;
				 }
				 this.timer=setTimeout("Showtip.toggleVis('"+this.tipID+"', 'hidden')",this.hideDelay);
				 if(this.followMouse)dw_event.remove(document,"mousemove",this.trackMouse,true);
				 this.tip=null;
		}
		//toggle Visibility method
		,toggleVis:function(id,vis){
						var el=document.getElementById(id);
						if(el)el.style.visibility=vis;
		}
		//track mouse method
		,trackMouse:function(e){
					e=dw_event.DOMit(e);
					Showtip.positionTip(e);
		}
};
Showtip.ttready = true;