button_off = new Image();
        button_off.src = "images/grenadavilla_button_off.gif";
        button_on = new Image();
        button_on.src = "images/grenadavilla_button_on.gif";

        button_next_off = new Image();
        button_next_off.src = "images/grenadavilla_button_next_off.gif";
        button_next_on = new Image();
        button_next_on.src = "images/grenadavilla_button_next_on.gif";

        button_back_off = new Image();
        button_back_off.src = "images/grenadavilla_button_back_off.gif";
        button_back_on = new Image();
        button_back_on.src = "images/grenadavilla_button_back_on.gif";

        button_down_off = new Image();
        button_down_off.src = "images/grenadavilla_button_down_off.gif";
        button_down_on = new Image();
        button_down_on.src = "images/grenadavilla_button_down_on.gif";

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