/*************************************************************************
  dw_tooltip.js   requires: dw_event.js and dw_viewport.js
  version date: May 21, 2005 moved init call to body onload
  (March 14, 2005: minor changes in position algorithm and timer mechanism)
  
  This code is from Dynamic Web Coding at dyn-web.com
  Copyright 2003-5 by Sharon Paine 
  See Terms of Use at www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/
	
var Tooltip = {
    followMouse: true,
    offX: 4,
    offY: 4,
    tipID: "tipDiv",
    showDelay: 500,
    hideDelay: 000,
    jscall: "",
    offsetX: 0,
    forceRight: false,
    forceLeft: false,
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.jscall,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)
	{
		if(!this.forceRight && !this.forceLeft){ // normal mode.
			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+this.offsetX+"px";
			this.tip.style.top=y+"px";
		}
		else 
		{
			var sideSpace = 0;
			var objSource;		
			
			if(isIE) {
				objSource = e.srcElement;
			}
			else {
				objSource = e.target;
			}
			
			var x = 0;
			var y = 0;
			var srcW = 0;
			var srcH = 0;
			
			if(document.getElementById('mainpagestyle')){
				if(viewport.width > document.getElementById('mainpagestyle').offsetWidth)
					sideSpace = (viewport.width - document.getElementById('mainpagestyle').offsetWidth)/2;
				else
					sideSpace=0;
			
				x = GetOffset(objSource, 'offsetLeft')+sideSpace+objSource.width;
				y = GetOffset(objSource, 'offsetTop')+objSource.height/2;	
				
				srcW = objSource.width;
				srcH = objSource.height;
			}
			else {
				x=e.pageX?e.pageX:e.clientX+viewport.scrollX;
				y=e.pageY?e.pageY:e.clientY+viewport.scrollY;
			}
			
			var yAdjust = 0; //somehow the hover doesn't align with the edge of the thumb.  So adjust the y a little bit.
			
			/* KH: this part is commented - uncomment it if you want the hover to show stationary on the edge of the tile
			if(x+this.tip.offsetWidth+this.offX>viewport.width+viewport.scrollX)
			{
				x=x-this.tip.offsetWidth-this.offX - srcW - yAdjust;
				if(x<0)x=0;}
			else 
				x=x+this.offX + yAdjust;
			*/
			
			// KH: this is added so the over always should on the right side of the title.
			if(this.forceRight)
				x=x+this.offX + yAdjust;
			else if(this.forceLeft)
				x=x+this.offX + yAdjust - this.tip.offsetWidth;
			
			
			if(document.getElementById('mainpagestyle')){
				if( (y+this.tip.offsetHeight/2 +this.offY <viewport.height+viewport.scrollY) && 
					(y-this.tip.offsetHeight/2 +this.offY >viewport.scrollY))
				{
					y = y-this.tip.offsetHeight/2 +this.offY;	// place in the middle		
				}
				else {	
					if(y -srcH +this.tip.offsetHeight+this.offY>viewport.height+viewport.scrollY) // place top
					{
						y=y + srcH -this.tip.offsetHeight-this.offY + yAdjust;
						
						if(y<viewport.scrollY)
						{
							y=viewport.height+viewport.scrollY-this.tip.offsetHeight + yAdjust;
						}
							
						if((y + this.tip.offsetHeight) > (viewport.height+viewport.scrollY)){
							y = viewport.height+viewport.scrollY - this.tip.offsetHeight;
						}
					}
					else { // place bottom
						y=y+this.offY - srcH - yAdjust;
						
						if(y<viewport.scrollY)
							y = viewport.scrollY;
					}
				}
			}
			else {
				if(y+this.tip.offsetHeight+this.offY>viewport.height+viewport.scrollY) // place top
				{
					y=y-this.tip.offsetHeight-this.offY + yAdjust;
					
					if(y<viewport.scrollY)
						y=viewport.height+viewport.scrollY-this.tip.offsetHeight + yAdjust;
				}
				else // place bottom
					y=y+this.offY - yAdjust;
			
			}
			
			this.tip.style.left=x+this.offsetX+"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);}};

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