<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
.a{
width: 100px;
height: 100px;
background: aquamarine;
margin-bottom: 10px;
}
</style>
<script type="text/javascript">
var timer;
window.onload=function(){
var div1=document.getElementById("div1");
var div2=document.getElementById("div2");
div1.onmouseover=function(){
startMove(this,"height",300);
}
div1.onmouseout=function(){
startMove(this,"height",100);console.log("hello");
}
}
function startMove(obj,attr,iTarget){
clearInterval(timer);
var icur=parseInt(getStyle(obj,attr));
timer=setInterval(function(){
speed=(iTarget-icur)/5;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(icur==iTarget){
clearInterval(timer);
}
else{
obj.style[attr]=icur+speed+'px';console.log("hello");
}
},50);
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
</script>
</head>
<body>
<div id="div1" class="a"></div>
<div id="div2" class="a"></div>
</body>
</html>
