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" />
<title>无标题文档</title>
<style>
body{margin:0;padding:0;}
#topFill{display:none;text-align:center;position:absolute;z-index = 999;filter:alpha(opacity=50);background-color:#eee;opacity: 0.5;-moz-opacity: 0.5;width:100%;}
#alertBox{margin:auto;height:150px;width:300px;background-color:#cf0;text-align:left;border:1px solid #666}
#alertTitle{height:20px;background-color:#EDF8B8;line-height:20px;padding:0 10px;border-bottom:1px solid #71860D}
#alertContent{padding:42px 0;;text-align:center;}
#alertBtn{text-align:center;}
#alertBtn input{margin:0 10px;background:#FFFF99;border:1px solid #fff;height:20px;line-height:20px;}
</style>
<script type="text/javascript" >
//document.documentElement.clientHeight+'px'
// onload的时候声明对象
var obj = new Object;
function oload(){
obj = document.getElementById('topFill');
obj.style.display = 'none';
}
function cl(){
document.body.style.overflow = 'hidden';
document.body.style.height = document.documentElement.clientHeight + 'px';
obj.style.display = 'block';
obj.style.height = document.documentElement.clientHeight + 'px';
}
function bcl(){
document.body.style.overflow = '';
obj.style.display = 'none';
}
function oresize(){
if(obj.style.display != 'block'){
}else{
cl();
}
}
function isno(str){
if (str == 'yes'){
window.close();
}else {
bcl();
}
}
</script>
</head>
<body onload="oload()" onresize="oresize()">
<div id="topFill">
<div id="alertBox">
<div id="alertTitle">警告!</div>
<div id="alertContent">你确定要退出吗?</div>
<div id="alertBtn"><input type="button" value="是(Y)" onclick="isno('yes')" /><input type="button" value="否(N)" onclick="isno('no')" /></div>
</div>
</div>
<input type="text" id="textaaa" />
<input type="button" value="点我" onclick="cl()"/>
</body>
</html>
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