Javascript简单实现可拖动的div

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我是靠谱客的博主魔幻发卡，这篇文章主要介绍Javascript简单实现可拖动的div，现在分享给大家，希望可以做个参考。

复制代码代码如下:

 
<html> 
<head> 
<script type="text/javascript"> 
var x; 
var y; 
function $(id) 
{ 
return document.getElementById(id) 
} 
function mousedown() 
{ 
x=event.clientX-$("px").style.pixelLeft; 
y=event.clientY-$("px").style.pixelTop; 
$("px").style.border="2px solid red"; 
$("px").onmousemove = mousemove; 
} 
function mouseup() 
{ 
$("px").onmousemove = ""; 
$("px").style.border=""; 
} 
function mousemove() 
{ 
$("px").style.pixelLeft=event.clientX-x; 
$("px").style.pixelTop=event.clientY-y; 
} 
</script> 
</head> 
<body> 
<div id="px" style="position:absolute; left:100px; height:100px; width:100px; background-color:#FF0;" 
onmousedown="mousedown()" onmouseup="mouseup()" > 
</div> 
</body> 
</html> 