闲来无事，信手写了个简单的拖动层，支持多浏览器，代码很少。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>最简单的拖动层-飘遥http://xianfen.net</title>
</head>
<body>
<div id="f" style="position: absolute; width: 500px; height: 350px; background-color: #ccc;
top: 150px; left: 200px; z-index: 101; border: solid 1px blue;">
<div id="title" style="background-color: Blue; cursor: move; height: 20px; color: #fff;
font-size: 13px; padding-top: 5px; padding-left: 10px;">
最简单的拖动层-飘遥http://xianfen.net
</div>
</div>
<script type="text/javascript">
var posX;
var posY;
fdiv = document.getElementById("f");
document.getElementById("title").onmousedown=function(e)
{
if(!e) e = window.event;
posX = e.clientX - parseInt(fdiv.style.left);
posY = e.clientY - parseInt(fdiv.style.top);
document.onmousemove = mousemove;
}
document.onmouseup = function()
{
document.onmousemove = null;
}
function mousemove(ev)
{
if(ev==null) ev = window.event;
fdiv.style.left = (ev.clientX - posX) + "px";
fdiv.style.top = ev.clientY - posY + "px";
}
</script>
</body>
</html>
经测试，IE6/7,FF,Opera9,Safari for windows 3 支持的都不错。
