if (document.images) 
   {
      menudir = "/images/menu/";

	  dot1 = new Image(8,4);
      dot1.src = menudir + "menu-a.png";
      dot2 = new Image(8,4);
      dot2.src = menudir + "menu-b.png";

	  bdot1 = new Image(7,3);
      bdot1.src = menudir + "menu-a-b.png";
      bdot2 = new Image(7,3);
      bdot2.src = menudir + "menu-b-b.png";

	  }

   function imgSwap(imgDocID,imgObjName) 
   {
	  if (document.images) 
      { 
       document.images[imgDocID].src = eval(imgObjName + ".src"); 
      }
   }