var isIE = document.all;
var mouseX = 0;
var mouseY = 0;

function captureMouse(e)
{ 
	if (!e) e = window.event;
	if (e)
	{ 
			mouseX = isIE ? (e.clientX + document.body.scrollLeft) : e.pageX;
			mouseY = isIE ? (e.clientY + document.body.scrollTop) : e.pageY;
	}
}

document.onmousemove = captureMouse;