// preload images for menu rollovers

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

      home1 = new Image(129,20);       home1.src = menudir + "home1.gif";
      home2 = new Image(129,20);       home2.src = menudir + "home2.gif";
      about1 = new Image(129,20);      about1.src = menudir + "about1.gif";
      about2 = new Image(129,20);      about2.src = menudir + "about2.gif";
      careers1 = new Image(129,20);    careers1.src = menudir + "careers1.gif";
      careers2 = new Image(129,20);    careers2.src = menudir + "careers2.gif";
      physician1 = new Image(129,20);  physician1.src = menudir + "physician1.gif";
      physician2 = new Image(129,20);  physician2.src = menudir + "physician2.gif";
      support1 = new Image(129,20);    support1.src = menudir + "support1.gif";
      support2 = new Image(129,20);    support2.src = menudir + "support2.gif";
      news1 = new Image(129,20);       news1.src = menudir + "news1.gif";
      news2 = new Image(129,20);       news2.src = menudir + "news2.gif";
      services1 = new Image(129,20);   services1.src = menudir + "services1.gif";
      services2 = new Image(129,20);   services2.src = menudir + "services2.gif";
      education1 = new Image(129,20);  education1.src = menudir + "education1.gif";
      education2 = new Image(129,20);  education2.src = menudir + "education2.gif";
      wellness1 = new Image(129,20);   wellness1.src = menudir + "wellness1.gif";
      wellness2 = new Image(129,20);   wellness2.src = menudir + "wellness2.gif";
      contact1 = new Image(129,20);    contact1.src = menudir + "contact1.gif";
      contact2 = new Image(129,20);    contact2.src = menudir + "contact2.gif";
      directions1 = new Image(129,20); directions1.src = menudir + "directions1.gif";
      directions2 = new Image(129,20); directions2.src = menudir + "directions2.gif";
      shop1 = new Image(129,20);       shop1.src = menudir + "shop1.gif";
      shop2 = new Image(129,20);       shop2.src = menudir + "shop2.gif";

      patients1 = new Image(129,20);   patients1.src = menudir + "patients1.gif";
      patients2 = new Image(129,20);   patients2.src = menudir + "patients2.gif";
      physicians1 = new Image(129,20); physicians1.src = menudir + "physicians1.gif";
      physicians2 = new Image(129,20); physicians2.src = menudir + "physicians2.gif";
      employees1 = new Image(129,20);  employees1.src = menudir + "employees1.gif";
      employees2 = new Image(129,20);  employees2.src = menudir + "employees2.gif";
      board1 = new Image(129,20);      board1.src = menudir + "board1.gif";
      board2 = new Image(129,20);      board2.src = menudir + "board2.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"); 
   }