html js 弹出层

<!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" />
<meta name="description" content="前端思考" />
<meta name="keywords" content="前端思考" />
<title>弹出层―到浏览器中央―背景变暗:前端思考</title>
<style>
*{margin:0;padding:0px;}
body{padding:30px;}
#show{width:886px;height:492px;display:none;padding:1px;position:absolute;border:1px solid #4c77aa;background:#f2f7fd;z-index:11;zoom:1;
background-image:url(%E5%BE%AE%E4%BF%A1%E5%95%86%E5%9F%8E%E7%BA%A2%E5%8C%85-02.jpg);}
#show h3{ color:#fff;font-size:14px;padding:5px;}
#show span{position:absolute;right:3px;top:3px;display:block;cursor:pointer;color:#000;font-weight:bold;}
#show p{padding:5px; } <!-- 886 492 -->
#text{font-size:12px;text-indent:2em;line-height:20px;  }
#bgbox{position:absolute;left:0;top:0;background:#000;filter:alpha(opacity=30);opacity:0.3;z-index:10}
</style>
<script type="text/javascript">
function show(){
var iWidth = document.documentElement.clientWidth;
var iHeight = document.documentElement.clientHeight;
var bgObj = document.createElement("div");
bgObj.setAttribute("id","bgbox");
bgObj.style.width = iWidth+"px";
bgObj.style.height =Math.max(document.body.clientHeight, iHeight)+"px";
document.body.appendChild(bgObj);
var oShow = document.getElementById('show');
oShow.style.display = 'block';
oShow.style.left = (iWidth-888)/2+"px";
oShow.style.top = (iHeight-494)/2+"px";
function oClose(){
oShow.style.display = 'none';
document.body.removeChild(bgObj);
}
var oClosebtn = document.createElement("span");
oClosebtn.innerHTML = "×";
oShow.appendChild(oClosebtn);
oClosebtn.onclick = oClose;
bgObj.onclick = oClose;
}
</script>
</head>
<body>
<a return false" href="#">请猛击我(我会弹到中间,同时背景变暗)</a>
<div id="show">
<h3>弹出层标题栏</h3>
<p id="text">
这里是弹出层内容,内容可以是文字、图片等,可以是iframe传进来,也可以用jQuery的load()传进来。如有什么不合理的或可以改进的,大家可以给我留言,共同学习。
</p>
</div>
</body>
</html>

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