window.event.clientX 和window.event.offsetX的区别
<script>
function init(){
document.getElementById("testDiv").style.display="none";
}
function showDiv(){
var tObj=document.getElementById("testDiv");
tObj.style.display="block";
tObj.style.position="absolute";
tObj.style.posTop=window.event.clientY;
tObj.style.posLeft=window.event.clientX; //直接点,就是光标的坐标
}
</script>
<body onload="init();">
<table><tr><td onclick="showDiv()">click me</td></tr></table>
<br><p>
<p><p><p><p><p><p><p>
<div id="testDiv">active media</div>
offsetX与clientX最大区别是offset的坐标相对于父对象而言的坐标
转 http://guigang520.blog.163.com/blog/static/90814934201031851720479/