為什么鼠標移上去沒效果啊
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<style type="text/css">
*{
? ? padding:0px;
? ? margin:0px;
}
?#sqr{
? ? width:200px;
? ? height:200px;
? ? background:red;
? ? filter:alpha(opacity:30);
? ? opacity:0.3;
?} ??
</style>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
? ? <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
? ? <title>透明度</title>
? ? <script>
window.onload=function(){
var dd=document.getElementById("sqr");
dd.onmouseover=function(){
startmove();
}
var a=null;
var alpha=30;
function startmove(){
? ? var dd=document.getElementById("sqr");
? ? clearInterval(a);
? a=setInterval(function(){
? if(alpha==100)
? ?{ clearInterval(a);}
else{
alpha=alpha+10;
dd.style.filter="alpha(opacity:"+alpha+")";
dd.style.opacity=alpha/100;
}
?},30)
}
? ? </script>
</head>
<body>
?<div id="sqr">
?</div> ??
</body>
</html>
2016-11-22
JS代碼最后少了一個"}"，補上就行了