var baseText = null; 
function showPopup(w,h){   
var popUp = document.getElementById("popupcontent");   
 popUp.style.top = "500px";   
 popUp.style.left = "500px"; 
 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";
 }