获取鼠标坐标

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

园子里看到的，据博主讲，兼容IE FF  chrome,

http://www.cnblogs.com/mingda/archive/2010/01/12/javascript_mouse_position_function.html

本人还没测试