为什么没有反应？

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>relative样式</title>
<style type="text/css">

#div1{

width: 200px;

height: 200px;

background: red;

opacity: 0.3;

filter:alpha(opacity:30);

}

</style>
<script type="text/javascript">
window.onload=function(){
var oDiv=document.getElementById("div1")
oDiv.onmouseover=function(){
startMove(100)
}
oDiv.onmouseout=function(){
startMove(30)
}
}

var timer=null
var alpha=30
function startMove(b){
clearInterval(timer)
var oDiv=document.getElementById("div1")
timer=setInterval(function(){
   var a=0
   if(alpha>b){
    a=-10
   }
   else{
    a=10
   }

if(alpha==b){
clearInterval(timer)
}
else{
  alpha+=a
oDiv.style.filter='alpha(opacity:'+alpha+')'
oDiv.style.opacity=alpha/100
},30)
}

</script>
</head>
<body>
<div id="div1"></div>
</body>
</html>

慕先生0450854

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1回答

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