[stickmus]

Not sure exactly what's wrong with that, but this works

document.getElementById('id').onmousemove=function(e) {
	var blah = mousepos(e);
	alert(blah.x);
	alert(blah.y);
};

function mousepos(e) {
	var x = 0;
	var y = 0;
	if (window.event) {
		x = window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop;
	} else {
		x = e.clientX;
		y = e.clientY;
	}
	return({x:x,y:y});
}