上次在写“JS打造div遮罩层霸屏广告”中，由于ad_bg这个id使用了绝对定位，导致在各个分辨率下显示不完美，因此浩叔将功补过，修改了另一个给大家用，下面就是完整html代码，里面的图片大家自己替换哈！
<!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>div遮罩层弹窗——示例二</title>
<style type="text/css">
#ad_show {
height: 550px;
width: 1000px;
border: 5px solid #999;
margin: 3% auto;
z-index: 50;
position: relative;
background-color: #FFF;
}
#ad_show #win_top a {
float: right;
margin-right: 5px;
}
#ad_bg {
background-color:#000;
position:absolute;
z-index:49;
width:100%;
height:100%;
opacity:0.6;
filter: alpha(opacity=60);
-moz-opacity: 0.6;
left: 0px;
top: 0px;
right: 0px;
bottom: 0px;
}
#close{position: absolute; right:0; top:0; cursor: pointer;}
</style>
</head>
<body>
<div id="ad_bg"></div>
<div id="ad_show">
<div id="close"><img src="close.png" onclick="ad_bg.style.display='none';ad_show.style.display='none'" width="50"></div>
<div class="content"><img src="index_ad.jpg"></div>
</div>
</body>
</html>
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