<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
div{
width: 200px;
height: 200px;
background: red;
filter:alpha(opacity:30);
opacity: 0.3;
margin:20px;
float:left;
}
</style>
<script type="text/javascript">
//框架调用
window.onload = function(){
var Odiv = document.getElementsByTagName('div');
for(var i = 0;i<Odiv.length;i++){
Odiv[i].alpha = 30;
Odiv[i].onmouseover = function(){
starMove(this,100);
};
Odiv[i].onmouseout = function(){
starMove(this,30);
}
}
}
//框架定义
function starMove(obj,iTarget)
{
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var speed = (iTarget - obj.alpha)/6;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
if(obj.alpha == iTarget){
clearInterval(obj.timer);
};
else{
obj.alpha += speed;
obj.style.filter = 'alpha(opcity:'+obj.alpha+')';
obj.style.opacity = obj.alpha/100;
};
},30);
}
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>