创建一个可拖动的DIV

var drag = function(){

    var obj = document.getElementById("id");

    var s = obj.style;

    var b = document.body;

    var x = event.clientX + b.scrollLeft - s.pixelLeft;

    var y = event.clientY + b.scrollTop - s.pixelTop; 

    var m = function(){

	  if(event.button == 1){

	   s.pixelLeft = event.clientX + b.scrollLeft - x;

	   s.pixelTop = event.clientY + b.scrollTop - y;

	  }else {

	   document.detachEvent("onmousemove", m);

	  }

    };

    document.attachEvent("onmousemove", m);

    if(!this.z)

	  this.z = 999;

    s.zIndex = ++this.z;

    event.cancelBubble = true;

};

然后在div中

另外，DIV中有自己的拖动事件ondrag()，但是下面的函数还有点问题是拖动时有重影。

<html>

<head>

<meta http-equiv="content-type" content="text/html;charset=utf-8">

</head>

<style type="text/css">

#myDiv{

	background-color:#01ff32;

	height:200px;

	width:200px;

	top:100px;

	left:300px;

	position:absolute;

}

h1{

	font-size:40px;

}

font{

	color:red;

}

</style>

<script>

function drag(event){

	document.getElementById('myDiv').style.top = event.clientY;

	document.getElementById('myDiv').style.left = event.clientX;

	document.getElementById('myDiv').style.cursor='default'

	//event.cancelBubble = true;

	document.getElementById('myDiv')

}

function changeCousor(){

}

</script>

<body>

<div id="myDiv" ondrag ="drag(event);" onmousedown = "this.draggable = true; " onmouseover="this.style.cursor='hand'">

	<center>

		<h1><font>drag me</font></h1>

	</center>

</div>

</body>

</html>

红色部分标记出来的部分比较重要。再有就是问题出现的原因应该是坐标的计算有点问题。目前的几个坐标还没有考虑清楚，后面会详细介绍几种坐标！

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创建一个可拖动的DIV

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