HTML 纯css浮窗居中和打开or关闭

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>HTML 纯css浮窗居中和打开or关闭</title>
<link rel="stylesheet" type="text/css" href="base.css" />
<style type="text/css">
.fixed{
	position: fixed;
	left: -100%;
	right:100%;
	top:0;
	bottom: 0;
	text-align: center;
	font-size: 0;
	_display:none;/*IE6隐藏,不显示*/
}
.fixed:after {
	content:"";
	display: inline-block;
	vertical-align: middle;
	height: 100%;
	width: 0;
}
.content{
	display: inline-block;
	*display: inline;
	*zoom: 1;
	vertical-align: middle;
	text-align: left;
	position: relative;
	right: -100%;
	font-size: 16px;
	background-color: #ddd;
	color: #06f;
	width: 200px;
	height: 150px;
}
.openbtn{ _display:none;}
</style>
</head>
<body>
<button onclick="document.getElementById('dialog').style.display = 'block'" class="openbtn">打开窗口</button>
<div class="fixed" id="dialog">
    <div class="content"> 
    <button style="position: absolute; right: 0; top: 0;" type="button" onclick="document.getElementById('dialog').style.display = 'none'">关闭窗口</button>
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    </div>
</div>
</body>
</html>

PS:IE6时,隐藏不显示。兼容IE8+,火狐,谷歌,欧朋,苹果。

效果图:
HTML 纯css浮窗居中和打开or关闭
 

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