<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{margin:0;padding:0;}
ul,li{
list-style: none;
}
ul li{
width: 200px;
height: 100px;
background: red;
margin-bottom: 20px;
border: 4px solid black;
}
</style>
<script type="text/javascript">
window.onload=function(){
var li1 = document.getElementById('li1');
var li2 = document.getElementById('li2');
li1.timer=null;
li2.timer=null;
li1.onmouseover=function(){
startMove(this,'width',400);
li1.onmouseout=function(){
startMove(this,'width',200);
}
li2.onmouseover=function(){
startMove(this,'height',400);
li2.onmouseout=function(){
startMove(this,'height',100);
}
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
function startMove(obj,attr,iTarget){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var icur=parseInt(getStyle(obj,attr));
var speed = (iTarget-icur)/8;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
if(iTarget == icur){
clearInterval(obj.timer)
}
else{
obj.style[attr]=icur+speed+'px';
}
},30);
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
<li id="li2"></li>
</ul>
</body>
</html>gothClaudia
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