<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title> new document </title>
<meta name="generator" content="editplus">
<meta name="keywords" content="">
<meta name="description" content="">
<style type="text/css">
#div1 {
position: absolute;
background-color: #ccc;
width: 100px;
height: 100px;
left: 100px;
top: 100px;
filter:alpha(opacity=60);
-moz-opacity: 0.60;
opacity: 0.60;
}
#div2 {
position: absolute;
background-color: #99FF99;
width: 100px;
height: 100px;
left: 150px;
top: 150px;
}
</style>
</head>
<body>
<iframe src="http://google.com" width="400" height="300"></iframe>
<div id="div1">
半透明
</div>
<div id="div2">
不透明
<button>不透明，不是吗？</button>
</div>
</body>
</html>
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