JS拖动层（简洁，全兼容）


最简洁的JS层拖动代码，全兼容ie、ff、opera、safari……每一种浏览器都有对应的判断和实现方法，你只需复制代码到你的网页中就可使用。水平高的朋友可以继续修改，添加更多方法，使其功能更强大。

答案：<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JS拖动层</title>
</head>
<body>
<div id="f" style="position: absolute; width: 216px; height: 138px; background-color: skyblue;font-size: 12px; top: 210px; left: 180px; z-index: 101; border: solid 1px blue;">
<div id="title" style="background-color: Blue; cursor: move; height: 20px; color: #fff;font-size: 12px; padding-top: 5px; padding-left: 10px;">层的标题</div>
层的内容
</div>
<script type="text/javascript">
var posX;
var posY;       
fdiv = document.getElementById("f");           
document.getElementById("title").onmousedown=function(e)
{
    if(!e) e = window.event;  //IE
    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;//IE
    fdiv.style.left = (ev.clientX - posX) + "px";
    fdiv.style.top = (ev.clientY - posY) + "px";
}
</script>
</body>
</html>

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