 
<!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=gbk" /> 
<title>無標(biāo)題文檔</title> 
<style type="text/css"> 
/*彈出層的STYLE*/ 
html,body {height:100%; margin:0px; font-size:12px;} 

.mydiv { 
background-color: #ff6; 
border: 1px solid #f90; 
text-align: center; 
line-height: 40px; 
font-size: 12px; 
font-weight: bold; 
z-index:99; 
width: 300px; 
height: 120px; 
left:50%;/*FF IE7*/ 
top: 50%;/*FF IE7*/ 

margin-left:-150px!important;/*FF IE7 該值為本身寬的一半 */ 
margin-top:-60px!important;/*FF IE7 該值為本身高的一半*/ 

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 { 
background-color: #ccc; 
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);/*IE5 IE5.5*/ 

} 
/*The END*/ 

</style> 
<script type="text/javascript"> 
function showDiv(){ 
document.getElementById('popDiv').style.display='block'; 
document.getElementById('bg').style.display='block'; 
} 

function closeDiv(){ 
document.getElementById('popDiv').style.display='none'; 
document.getElementById('bg').style.display='none'; 
} 

</script> 
</head> 

<body> 

<div id="popDiv" class="mydiv" style="display:none;">恭喜你！<br/>你的成績?yōu)?60分<br/> 
<a href="javascript:closeDiv()">關(guān)閉窗口</a></div> 
<div id="bg" class="bg" style="display:none;"></div> 

<div style="padding-top: 20px;"> 
<input type="Submit" name="" value="顯示層" onclick="javascript:showDiv()" /> 
</div> 
</body> 
</html> 