<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
div{
width:200px;
height:200px;
background:red;
margin:10px;
float:left;
border:1px #000000 double;
}
</style>
<script>
window.onload=function(){
var oDiv1=document.getElementById('div1');
oDiv1.onmousemove=function(){
onStart(this,400,'width');
}
oDiv1.onmouseout=function(){
onStart(this,200,'width');
}
var oDiv2=document.getElementById('div2');
oDiv2.onmousemove=function(){
onStart(this,400,'height');
}
oDiv2.onmouseout=function(){
onStart(this,200,'height');
}
}
//var alpha=30;
function onStart(obj,tag,value){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var cur=parseInt(getStyle(obj,value));
var speed=(tag-cur)/6;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(tag==cur){
clearInterval(obj.timer);
}else{
obj.style[value]=cur+speed+'px';
}
},30);
}
function getStyle(obj,name){
if(obj.currentStyle){
return obj.currentStyle[name];
}else{
return getComputedStyle(obj,false)[name];
}
}
</script>
</head>
<body>
<div id="div1">变宽</div>
<div id="div2">变高</div>
</body>
</html>
