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javascript弹出一个层并增加一个覆盖层

　　本文标签：javascript,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> 
<head> 
    <title>Untitled</title> 
</head>

<body style="height:100%;">

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<input name="button2" onclick="ShopConfirm(fdsaf)" value="点我" type="button"/>

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<input name="button" onclick="ShopConfirm(fdsaf)" value="点我" type="button"/> 
 
<div id="ShopConfirmLayer" style="position:absolute;top:300px;left:100px;z-index:900;border:1px red solid;width:500px;display:none;">

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<input name="button1" value="关闭" type="button" onclick="CloseShopConfirm()"/> 
</div> 
 
<div id="webBgLayer" style="position:absolute;top:0px;left:0px;z-index:899;background-color:#ccc;height:100%;width:100%;display:none;-moz-opacity:0.5;filter:alpha(opacity=50);"></div> 
<script type="text/javascript"> 
    function ShopConfirm(str){ 
        var ShopConfirmLayer=document.getElementById("ShopConfirmLayer"); 
        var webBgLayer=document.getElementById("webBgLayer"); 
     // ShopConfirmLayer.innerHTML=str; 
         ShopConfirmLayer.style.display=""; 
     ShopConfirmLayer.style.left=parseInt((document.documentElement.scrollWidth-ShopConfirmLayer.offsetWidth)/2)+document.documentElement.scrollLeft+"px"; 
     ShopConfirmLayer.style.top=Math.abs(parseInt((document.documentElement.clientHeight-ShopConfirmLayer.offsetHeight)/2))+document.documentElement.scrollTop+"px"; 
     webBgLayer.style.display=""; 
     webBgLayer.style.height=document.documentElement.scrollHeight+"px"; 
    } 
    function CloseShopConfirm(){ 
        var ShopConfirmLayer=document.getElementById("ShopConfirmLayer"); 
        var webBgLayer=document.getElementById("webBgLayer"); 
        ShopConfirmLayer.style.display="none"; 
        webBgLayer.style.display="none"; 
    } 
</script> 
</body> 
</html>

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