<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题</title>
<style type="text/css">
body,ul{
margin: 0;
padding: 0;
}
ul,li{
list-style: none;
}
ul li{
width: 200px;
height: 100px;
background-color: yellow;
margin-bottom: 10px;
}
</style>
<script type="text/javascript">
window.onload = function(){
var aLi=document.getElementsByTagName('li');
for (var i = 0; i < aLi.length; i++) {
aLi[i].timer = null;
aLi[i].onmouseover=function(){
startMove(this,400);
}
aLi[i].onmouseout = function(){
startMove(this,200);
}
}
}
//var timer=null;
function startMove(obj,iTarget){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var speed =(iTarget-obj.offsetWidth)/10;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
if (obj.offsetWidth == iTarget) {
clearInterval(obj.timer);
}
else{
obj.style.Width = obj.offsetWidth + speed +'px';
}
},30)
}
</script>
</head>
<body>
<ul>
<li></li>
<li></li>
<li></li>
</ul>
</body>
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