<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8">
<style type="text/css">
div{
width: 200px;
height: 200px;
background: red;
margin: 20px;
float: left;
opacity: 0.3;
}
</style>
<script type="text/javascript">
window.onload=function(){
var aDiv=document.getElementsByTagName('div');
for (var i = 0; i < aDiv.length; i++) {
aDiv[i].timer=null;
aDiv[i].onmouseover=move(this,100);
};
for (var i = 0; i < aDiv.length; i++) {
aDiv[i].onmouseout=move(this,30);
};
};
function move(obj,tar){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var alpha=30;
if(alpha==tar){
clearInterval(obj.timer);
}else{
var speed=(tar-alpha);
speed=speed>0?Math.ceil(speed):Math.floor(speed);
alpha+=speed;
};
obj.style.opacity=alpha/100;
} , 30);
};
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>
qq_冲哥_0
花满楼的小前端a
知目