大神指点下
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style type="text/css">
* {
margin:0 ;
padding:0;
}
ul{
list-style: none;
}
ul li{
width: 200px;
height: 100px;
background: #ffff00;
margin-bottom: 20px;
}
</style>
<script type="text/javascript">
window.onload=function(){
var Li1=document.getElementById('li1');
var Li2=document.getElementById('li2');
Li1.onmouseover=function () {
startMove(this,'height',400);
}
Li1.onmouseout=function () {
startMove(this,'height', 100);
}
Li2.onmouseover=function () {
startMove1(this,'width',400);
}
Li2.onmouseout=function () {
startMove1(this, 'width',200);
}
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
var timer=null;
function startMove(obj,attr,target) {
clearInterval(obj.timer);
obj.timer=setInterval(function (){
var icu=parseInt(getStyle(obj,'[attr]'));
var speed=(target-icu)/8;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if (target==icu){
clearInterval(obj.timer);
}else{
obj.style[attr]=icu+speed+'px';
}
} ,30)
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
<li id="li2"></li>
</ul>
</body>
</html>
