<!doctype html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="muyou">
<meta name="Keywords" content="牧佑叔叔">
<meta name="Description" content="-牧佑">
<title>Document</title>
<style>
#div1 {
width:100px;
height:100px;
background:red;
opacity:0.5;
}
</style>
</head>
<body>
<!--opacity:0.5; 透明度
IE下 filter:Alpha(Opacity=60)相当与0.6 100相当于1-->
<div id="div1"></div>
</body>
</html>
