代码里面的Li1无法运行，调试找不到bug求各位大神帮助？？？
<!DOCTYPE html>
<!-- saved from url=(0089)file:///C:/Users/Administrator/Desktop/%E5%A4%9A%E7%89%A9%E4%BD%93%E5%8A%A8%E7%94%BB.html -->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="UTF-8">
<title>多物体动画</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
ul,li{
list-style: none;
}
ul li{
width : 200px;
height: 100px;
background: #1E90FF;
margin-bottom: 20px;
border: 4px solid #000;
}
</style></head>
<body>
<script type="text/javascript">
window.onload=function(){
/*var oAl=document.getElementsByTagName('li');
for (var i = 0; i < oAl.length; i++) {
oAl[i].timer=null;
oAl[i].onmouseover=function(){
startMove(this,400);
}
oAl[i].onmouseout=function(){
startMove(this,200);
}*/
//var timer=null;
//var alpha=30;关键不能公用
var Li1=document.getElementById('li1');
Li1.onmouseover=function(){
startMove(this,'height',400);
}
Li1.onmouseover=function(){
startMove(this,'height',200);
}
var Li2=document.getElementById('li2');
Li2.onmouseover=function(){
startMove(this,'height',400);
}
Li2.onmouseout=function(){
startMove(this,'height',100);
}
function startMove(obj,attr,iTarget){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var speed=(iTarget-parseInt(getStyle(obj,attr)))/8;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if (parseInt(getStyle(obj,attr))==iTarget) {
clearInterval(obj.timer);
}else{
obj.style[attr]=parseInt(getStyle(obj,attr))+speed+'px';
}
},30)
}
};
function getStyle(obj,attr){
if (obj.currentStyle) {
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
</script>
<ul>
<li id="li1"></li>
<li id="li2"></li>
<li id="li3"></li>
</ul>
</body></html>
