IE, FireFox, Opera 浏览器支持CSS实现Alpha半透明的方法

[ray1980]

<div id="out">
  <div id="in">不透明<div>
  <div id="alpha">半透明<div>
<div>
<style type="text/css">
#out{
padding:20px 0;
height:100px;
width:200px;
position:relative;
}
#in{
background:#fff;
margin:0 10px;
}
#alpha{
position: absolute;
top:0;
left: 0;
width: 100%;
height:100%;
-ms-filter: "progid: DXImageTransform.Microsoft.Alpha(Opacity=30)"; /*IE8*/
filter:alpha(opacity=30); /*IE5、IE5.5、IE6、IE7*/
opacity: .3; /*Opera9.0+、Firefox1.5+、Safari、Chrome*/
z-index: -1; /*让其位于in的下面*/
background:#fff;
}
</style>

[作者]

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