代码语言:javascript复制
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
*{margin:0;padding: 0;;list-style: none;}
#div{width: 100px;height: 100px;background: black;position: absolute;}
</style>
</head>
<body>
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<div id='div'></div>
<script type="text/javascript">
div.onmousedown = function(e){
var ev = e || event;
var l = ev.clientX - div.offsetLeft;//获取到div到div的鼠标之间的距离.
var t = ev.clientY - div.offsetTop;
document.onmousemove = function(e){
var ev = e || event;
div.style.left = ev.clientX - l 'px';//移动后的鼠标(350 350)减去down时候的div到div的鼠标之间(150-100=50)的距离.等于左上角在哪里。
//比如down左上角是100 100,鼠标是150 150,移动后是左上角是300 鼠标是350的话,
//350-50=300就行了啊,左上角是300 300啊。鼠标在div里·,就是300 50=350啊。
div.style.top = ev.clientY - t 'px';
};
document.onmouseup = function(){
document.onmousemove = null;//抬起清空.
document.onmouseup = null;
};
return false;
};
</script>
</body>
</html>
思路;举个例子把,好把。我刚开始是