// preload images for menu rollovers

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

      home1 = new Image(45,35);
      home1.src = menudir + "home1.gif";
      home2 = new Image(45,35);
      home2.src = menudir + "home2.gif";

      integration1 = new Image(103,35);
      integration1.src = menudir + "integration1.gif";
      integration2 = new Image(103,35);
      integration2.src = menudir + "integration2.gif";

      skills1 = new Image(59,35);
      skills1.src = menudir + "skills1.gif";
      skills2 = new Image(59,35);
      skills2.src = menudir + "skills2.gif";

      tradition1 = new Image(86,35);
      tradition1.src = menudir + "tradition1.gif";
      tradition2 = new Image(86,35);
      tradition2.src = menudir + "tradition2.gif";

      understanding1 = new Image(127,35);
      understanding1.src = menudir + "understanding1.gif";
      understanding2 = new Image(127,35);
      understanding2.src = menudir + "understanding2.gif";
   }

   // simple image replacements

   function rollOn(imgID)
   {
      if (document.images) document.images[imgID].src = eval(imgID + "2.src"); 
   }

   function rollOff(imgID)
   {
      if (document.images) document.images[imgID].src = eval(imgID + "1.src"); 
   }