div弹出层,对话框居中

<!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=utf8" />
<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:300px;height:200px;display:none;padding:1px;position:absolute;border:1px solid #4c77aa;background:#f2f7fd;z-index:11;zoom:1;}
#show h3{background:#4c77aa;color:#fff;font-size:14px;padding:5px;}
#show span{position:absolute;right:3px;top:3px;display:block;cursor:pointer;color:#fff;font-weight:bold;}
#show p{padding:5px;}
#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-302)/2+"px";
    oShow.style.top = (iHeight-202)/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 onclick="show(); 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>
posted on 2013-11-19 14:20 小码农_ZXB 阅读(206) 评论(0) 收藏举报