日期:2014-05-17  浏览次数:20654 次

css实现shadow窗口

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/*关键点:
 1 半透明的兼容写法:opacity:0.5,filter:alpha(opacity:50);
 2 z-index:要想z-index起作用必须给dom元素添加position:absolute;
 3 窗口遮挡效果的实现:shadow的div添加:display="display" 不是disabled */

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>shadow窗口</title>
<style>
	.shadow{
		opacity:0.5 !important;/*关键*/
		padding:0px;
		margin:0px;
		position:absolute;/*关键*/
		top:0px;
		left:0px;
		z-index:100;/*关键*/
		width:100%;
		height:100%;
		background:gray;/*关键*/
		filter:alpha(opacity:50);/*关键*/
	}
</style>
</head>

<body style="border:1px solid red;padding:0px;margin:0px;">
<div class="shadow" readonly="readonly"></div>
<input type="button" value="alert('aaaaaaaaaaa')" onclick="alert('aaaaaaaaaaa')">
<div style="z-index:20000;position:absolute;top:20%;left:30%;">
<input type="button" value="alert('bbbbbbbbbbbbbb')" onclick="alert('bbbbbbbbbbbbbb')">
</div>
</body>
</html>