最近看书，练习下，写了个简单的拖拽
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<!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>简单拖拽</title>
<style type="text/css">
html,body{overflow:hidden;}
body,div,h2,p{margin:0;padding:0;}
body{color:#fff;background:#000;font:12px/2 Arial;}
p{padding:0 10px;margin-top:10px;}
span{color:#ff0;padding-left:5px;}
#wrapper{position:absolute;width:300px;height:150px;background:#333;border:2px solid #ccc; cursor:move;}
</style>
</head>
<body>
<div id="wrapper">
<p>This is a box.</p>
</div>
</body>
</html>
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<script type="text/javascript">
window.onload = function(){
var oDiv = document.getElementById("wrapper");
var posX,posY;
var listener = false;
oDiv.onmousedown = function(e){
e = e || window.event;
listener = true;
posX = e.clientX - parseInt(oDiv.offsetLeft);
posY = e.clientY - parseInt(oDiv.offsetTop);
return false;
};
document.onmousemove = function(e){
e = e || window.event;
if (listener == true){
oDiv.style.left = e.clientX - posX + "px";
oDiv.style.top = e.clientY - posY + "px";
}
return false;
};
document.onmouseup=function(){
listener=false;
};
}
</script>
?大牛们轻拍，本人菜鸟