var offsetxpoint = 0; // x offset of tooltip
var offsetypoint = 15 // y offset of tooltip

var ie = document.all;
var ns6 = (!ie && document.getElementById);
var enabletip = false;

if (ie || ns6)
{
	var tipobj = (document.all) ? document.all["contextualHelp"] : (document.getElementById) ? document.getElementById("contextualHelp") : "";
}

function ietruebody()
{
	return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body;
}

function ShowHoverTip(thetext, thecolor, thewidth)
{
	if (ns6 || ie)
	{
		if (typeof thewidth != "undefined")
			tipobj.style.width = thewidth+"px";

		if (typeof thecolor != "undefined" && thecolor!= "")
			tipobj.style.backgroundColor = thecolor;
 		
		tipobj.innerHTML = thetext;
		enabletip = true;
		return false;
	}
}

function positiontip(e)
{
	if (enabletip) 
	{
		var curX = (ns6) ? e.pageX : event.clientX+ietruebody().scrollLeft;
		var curY =(ns6) ? e.pageY : event.clientY+ietruebody().scrollTop;
		
		//Find out how close the mouse is to the corner of the window
		var rightedge = (ie && !window.opera) ? ietruebody().clientWidth-event.clientX-offsetxpoint : window.innerWidth-e.clientX-offsetxpoint-20;
		var bottomedge = (ie &&!window.opera) ? ietruebody().clientHeight-event.clientY-offsetypoint : window.innerHeight-e.clientY-offsetypoint-20;
		
		var leftedge = (offsetxpoint <0) ? offsetxpoint*(-1) : -1000;
		
		//if the horizontal distance isn't enough to accomodate the width of the context menu
		if (rightedge < tipobj.offsetWidth) //move the horizontal position of the menu to the left by it's width
			tipobj.style.left = (ie) ? ietruebody().scrollLeft+event.clientX-tipobj.offsetWidth+"px" : window.pageXOffset+e.clientX-tipobj.offsetWidth+"px";
		else if (curX < leftedge)
			tipobj.style.left = "5px";
		else //position the horizontal position of the menu where the mouse is positioned
			tipobj.style.left = curX+offsetxpoint+"px";
			
		if (bottomedge < tipobj.offsetHeight)
			tipobj.style.top = (ie) ? ietruebody().scrollTop+event.clientY-tipobj.offsetHeight-offsetypoint+"px" : window.pageYOffset+e.clientY-tipobj.offsetHeight-offsetypoint+"px";
		else
			tipobj.style.top = curY+offsetypoint+"px";
			
		tipobj.style.visibility = "visible";
	}
}

function HideHoverTip(){
	if (ns6 || ie)
	{
		enabletip = false;
		tipobj.style.visibility = "hidden";
		tipobj.style.left = "-1000px";
		tipobj.style.backgroundColor = '';
		tipobj.style.width = '';
	}
}

document.onmousemove = positiontip;