不能实现高度变高
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>宽和高度的变化</title>
<style type="text/css">
*{padding: 0;margin:0;}
ul li{
width:300px;
height: 100px;
background-color: red;
margin-bottom:20px;
border:5px solid green;
}
</style>
<script type="text/javascript">
window.onload=function(){
/* var opp=document.getElementsByTagName("li");
for (var i=0;i<opp.length;i++){
opp[i].timer=null;
opp[i].onmouseover=function(){
startMove(this,400);
}
opp[i].onmouseout=function(){
startMove(this,200);
}
}*/
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 startMove1(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(icur==iTarget){
clearInterval(obj.timer);
}
else{
obj.style[attr]=icur+speed+'px';
}
},30)
}
function getStyle(obj,attr){
if (obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
<li id="li2"></li>
</ul>
</body>
</html>
这是我的代码 但是运行之后不能实现高度变高
