// Swap image function 
  function ChangeImage (ImageName, FileName) {
    if (document.images) {
      document[ImageName].src = eval(FileName + ".src");
    }
  }
  
  // Popup window function
  function openWindow(url, name, size, scroll) {
    popupWin=window.open(url, name, '"toolbar=no,' + size +',left=15,top=15,status=yes,' + scroll +',resize=no,menubar=no"');
  }