var mousePosX = 0;
var MousePosY = 0;

function updateMousePos(e) 
{

	if (!e)
		e = window.event;

	var body = (window.document.documentElement) ? window.document.documentElement : window.document.body;
	mousePosX = e.pageY ? e.pageY : e.clientY + body.scrollTop - body.clientTop;
	mousePosY = e.pageX ? e.pageX : e.clientX + body.scrollLeft  - body.clientLeft;
}

window.document.onmousemove = updateMousePos;