document.onmousedown = getMousePos;

var ie5 = (document.getElementById && document.all && document.styleSheets)?1:0;
var nn6 = (document.getElementById && !document.all)?1:0;
var mouseXPos = -1;
var mouseYPos = -1;

function getMousePos(e) {
	if(ie5) {
		mouseXPos = event.clientX + document.body.scrollLeft;
		mouseYPos = event.clientY + document.body.scrollTop;
	}
	else {
		mouseXPos = e.pageX;
		mouseYPos = e.pageY;
	}
}