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Html-Css-div透明层剧中

2015-06-01 15:06 537 查看 
<!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=gb2312" />
<title>Div+CSS实现始终居中的半透明弹出层</title>
<style type="text/css">
<!--
html, body {
height: 100%;
margin: 0px;
font-size: 12px;
}

.mydiv {
background-color: #FFCC66;
border: 1px solid #f00;
text-align: center;
line-height: 40px;
font-size: 12px;
font-weight: bold;
z-index: 999;
width: 300px;
height: 120px;
left: 50%;
top: 50%;
margin-left: -150px !important; /*FF IE7 该值为本身宽的一半 */
margin-top: -60px !important; /*FF IE7 该值为本身高的一半*/
margin-top: 0px;
position: fixed !important; /* FF IE7*/
position: absolute; /*IE6*/
_top: expression(eval(document.compatMode &&
document.compatMode == 'CSS1Compat')?
documentElement.scrollTop+ (document.documentElement.clientHeight-this.offsetHeight)/2:
/*IE6*/
document.body.scrollTop+ (document.body.clientHeight- this.clientHeight)/2);
/*IE5 IE5.5*/
}

.bg, .popIframe {
background-color: #666;
display: none;
width: 100%;
height: 100%;
left: 0;
top: 0; /*FF IE7*/
filter: alpha(opacity = 50); /*IE*/
opacity: 0.5; /*FF*/
z-index: 1;
position: fixed !important; /*FF IE7*/
position: absolute; /*IE6*/
_top: expression(eval(document.compatMode &&
document.compatMode == 'CSS1Compat')?
documentElement.scrollTop+ (document.documentElement.clientHeight-this.offsetHeight)/2:
/*IE6*/
document.body.scrollTop+ (document.body.clientHeight- this.clientHeight)/2);
}

.popIframe {
filter: alpha(opacity = 0); /*IE*/
opacity: 0; /*FF*/
}
-->
</style>
<script language="javascript" type="text/javascript">
function showDiv() {
document.getElementById('popDiv').style.display = 'block';
document.getElementById('popIframe').style.display = 'block';
document.getElementById('bg').style.display = 'block';
}
function closeDiv() {
document.getElementById('popDiv').style.display = 'none';
document.getElementById('bg').style.display = 'none';
document.getElementById('popIframe').style.display = 'none';
}
</script>
</head>
<body>
<div id="popDiv" class="mydiv" style="display: none;">
aaaaaaaaa <br>
<a href="javascript:closeDiv()">关闭窗口</a>
</div>
<div id="bg" class="bg" style="display: none;"></div>
<a href="javascript:showDiv()">点击这里弹出层</a>
<iframe id='popIframe' class='popIframe' frameborder='0'></iframe>
</body>
</html>
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