var winPopUp = null;
 
  function OpenWindow(URL, Width, Height){
   if (winPopUp != null && !winPopUp.closed){
    winPopUp.close();
   }
   
   winPopUp = window.open(URL,"","width=" + Width + ",height=" + Height + ",resizable=no,scrollbars=no,statusbar=no, location=no, toolbar=no, menubar=no, status=no");
  }