为什么没效果呢
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style type="text/css">
body {margin:0;}
.divs {
width:200px;
height:200px;
background: red;
opacity:0.3;
filter:alpha(opacity:30);
cursor:pointer;
}
</style>
<script type="text/javascript">
window.onload = function(){
var timer = null;
var apa = 30;
var oDiv=document.getElementsByClassName("divs")[0];
function Alphas (iTarget){
clearInterval(timer);
var Speed = 0;
if(iTarget>apa){
Speed = 10;
}else if(iTarget<apa){
Speed = -10;
}
timer = setInterval(function(){
if(apa ==iTarget){
clearInterval(timer)
}else{
apa+=Speed;
oDiv.style.opacity = apa/100;
oDiv.style.filter="alpha(opacity:"+apa+")";
//console.log(apa);
}
},20)
oDiv.onmouseover=function(){
Alphas(100);
}
oDiv.onmouseout=function(){
Alphas(30);
}
}
}
</script>
</head>
<body>
<div class="divs"></div>
</body>
</html>为什么移入移出都没效果呢？怎么也找不到问题在哪 也不报错
