<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>多物体动画+获取样式2</title>
<style>
ul,li{list-style: none;}
ul li{width: 200px;height: 100px;background-color: yellow;margin-bottom: 20px;
border:10px solid #0000FF;}
</style>
<script>
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(){
startMove(this,'width',400);
}
Li2.onmouseout=function(){
startMove(this,'width',200);
}
}
function getStyle(obj,attr){ /*此函数用来获取样式*///可以改变宽高、背景属性、字号属性、边框属性等等
if(obj.currentStyle){
return obj.currentStyle[attr];/*currentStyle针对IE*/
}
else{
return getComputedStyle(obj,false)[attr];/*getComputedStyle针对Firefox*/
}
}
// var timer=null;
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(icur==iTarget){
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>
