var offsetxpoint = -20; //Customize x offset of tooltip
var offsetypoint = 20;  //Customize y offset of tooltip
var ie           = document.all;
var ns6          = document.getElementById && !document.all;
var enabletip    = false;
var element      = "undefined";

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

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

function ddrivetip(thetext, thecolor, thewidth, theelement)
{
	if (ns6||ie)
	{
		if (typeof thewidth!="undefined") 
		{
			tipobj.style.width = thewidth+"px";
		}
		if (typeof thecolor!="undefined" && thecolor!="") 
		{
			tipobj.style.backgroundColor = thecolor;
		}
		if (typeof theelement != "undefined")
		{
			element = theelement;
		}

		tipobj.innerHTML = thetext;
		enabletip        = true;

		return false;
	}
}

function positiontip(e)
{
	if (enabletip)
	{
		var curX = ns6 ? e.pageX : event.x + ietruebody().scrollLeft;
		var curY = ns6 ? e.pageY : event.y + 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 (element != "undefined")
		{
			var map = document.getElementById(element);
			var absXPos = ns6 ? 0 : getAbsX(map);
			var absYPos = ns6 ? 0 : getAbsY(map);
		}
		else
		{
			var absXPos = 0;
			var absYPos = 0;
		}
		
		//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+absXPos+"px";
		}
		
		//same concept with the vertical position
		if (bottomedge<tipobj.offsetHeight)
		{
			tipobj.style.top = ie ? ietruebody().scrollTop+event.clientY-tipobj.offsetHeight-offsetypoint-absYPos+"px" : window.pageYOffset+e.clientY-tipobj.offsetHeight-offsetypoint-absYPos+"px";
		}
		else
		{
			tipobj.style.top = curY+offsetypoint+absYPos+"px";
		}
		
		tipobj.style.visibility = "visible";
	}
}

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

function getAbsX(elt) 
{ 
	return parseInt(elt.x) ? elt.x : getAbsPos(elt,"Left"); 
}

function getAbsY(elt) 
{ 
	return parseInt(elt.y) ? elt.y : getAbsPos(elt,"Top"); 
}

function getAbsPos(elt,which) 
{
	iPos = 0;
	while (elt != null) 
	{
		iPos += elt["offset" + which];
		elt = elt.offsetParent;
	}
	return iPos;
}

document.onmousemove = positiontip;