js弹出窗口之弹出层的小例子

[html]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">  
<HTML xmlns="http://www.w3.org/1999/xhtml">  
<HEAD>  
<TITLE>弹出窗口</TITLE>  
<META http-equiv=Content-Type content="text/html; charset=utf-8">  
<style>  
#popupcontent{   
  position: absolute;  
  visibility: hidden;     
  overflow: hidden;     
  border:1px solid #CCC;     
  background-color:#F9F9F9;     
  border:1px solid #333;     
  padding:5px;}  
</style>  
<script>  
var baseText = null;   
function showPopup(w,h){     
    var popUp = document.getElementById("popupcontent");     
    popUp.style.top = "200px";     
    popUp.style.left = "200px";     
    popUp.style.width = w + "px";     
    popUp.style.height = h + "px";      
    if (baseText == null) baseText = popUp.innerHTML;    
    popUp.innerHTML = baseText + "<div id=\"statusbar\"><input type=\"button\" value=\"Close window\" onClick=\"hidePopup();\"></div>";     
    var sbar = document.getElementById("statusbar");     
    sbar.style.marginTop = (parseInt(h)-60) + "px";    
    popUp.style.visibility = "visible";  
}  
function hidePopup(){     
    var popUp = document.getElementById("popupcontent");     
    popUp.style.visibility = "hidden";  
}  
</script>  
<META content="MSHTML 6.00.2900.2838" name=GENERATOR></HEAD>  
<BODY>  
<div id="popupcontent">content</div>  

  
<p><a href="#" onClick="showPopup(300,200);" >onclick</a></p>  
</BODY>  
</HTML>  
js弹出窗口之弹出层的小例子

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