感觉我和老师写的差不多啊怎么这么大问题啊，定时器还是一个感觉。。。大神帮我看下
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>多物体运动</title>
<style type="text/css">
*{margin:0;padding:0;}
ul{
width:600px;
height:600px;
border:1px solid #000;
list-style:none;
}
li{
width:60px;
height:100px;
background:#F00;
display:block;
float:left;
margin:auto 0px auto 20px;
}
</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,100)
};
};
};
//var timer=null;
function startMove(obj,iTarget){
clearInterval(obj.timer);
speed=(iTarget-obj.offsetHeight)/10;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
obj.timer=setInterval(function(){
if(obj.offsetHeight==iTarget){
clearInterval(obj.timer);
}
else{
obj.style.height=obj.offsetHeight+speed+'px';
}
},30)
};
</script>
</head>
<body>
<ul>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>
