if (document.images) {            
   img1on = new Image();   img1on.src = "images/home_on.gif"; 
   img2on = new Image();   img2on.src = "images/academy_on.gif"; 
   img3on = new Image();   img3on.src = "images/dealers_only_on.gif"; 
   img4on = new Image();   img4on.src = "images/dealer_directory_on.gif"; 
   img5on = new Image();   img5on.src = "images/facility_on.gif"; 
   img6on = new Image();   img6on.src = "images/ajc_autoshow_on.gif"; 
   img7on = new Image();   img7on.src = "images/about_on.gif"; 
   img8on = new Image();   img8on.src = "images/subnav_about_autohistory_on.gif"; 
   img9on = new Image();   img9on.src = "images/subnav_about_commservice_on.gif"; 
   img10on = new Image();   img10on.src = "images/subnav_about_directions_on.gif"; 
   img11on = new Image();   img11on.src = "images/subnav_about_contact_on.gif"; 
   img12on = new Image();   img12on.src = "images/subnav_academy_register_on.gif"; 
   img13on = new Image();   img13on.src = "images/subnav_academy_salestrain_on.gif"; 
   img14on = new Image();   img14on.src = "images/subnav_academy_servicetrain_on.gif"; 
   img15on = new Image();   img15on.src = "images/subnav_facility_tour_on.gif";
   img16on = new Image();   img16on.src = "images/subnav_autoshow_tour_on.gif";
   img17on = new Image();   img17on.src = "images/subnav_dealersonly_sales_on.gif";
   img18on = new Image();   img18on.src = "images/subnav_dealersonly_service_on.gif";
   img19on = new Image();   img19on.src = "images/subnav_academy_training_on.gif";
   img20on = new Image();   img20on.src = "images/vt_previous_on.gif";
   img21on = new Image();   img21on.src = "images/vt_next_on.gif";
   
   img1off = new Image();  img1off.src = "images/home_off.gif"; 
   img2off = new Image();  img2off.src = "images/academy_off.gif"; 
   img3off = new Image();  img3off.src = "images/dealers_only_off.gif"; 
   img4off = new Image();  img4off.src = "images/dealer_directory_off.gif"; 
   img5off = new Image();  img5off.src = "images/facility_off.gif"; 
   img6off = new Image();  img6off.src = "images/ajc_autoshow_off.gif"; 
   img7off = new Image();  img7off.src = "images/about_off.gif"
   img8off = new Image();  img8off.src = "images/subnav_about_autohistory_off.gif"
   img9off = new Image();  img9off.src = "images/subnav_about_commservice_off.gif"
   img10off = new Image();  img10off.src = "images/subnav_about_directions_off.gif"
   img11off = new Image();  img11off.src = "images/subnav_about_contact_off.gif"
   img12off = new Image();  img12off.src = "images/subnav_academy_register_off.gif"
   img13off = new Image();  img13off.src = "images/subnav_academy_salestrain_off.gif"
   img14off = new Image();  img14off.src = "images/subnav_academy_servicetrain_off.gif"
   img15off = new Image();  img15off.src = "images/subnav_facility_tour_off.gif"
   img16off = new Image();  img16off.src = "images/subnav_autoshow_tour_off.gif"
   img17off = new Image();  img17off.src = "images/subnav_dealersonly_sales_off.gif"
   img18off = new Image();  img18off.src = "images/subnav_dealersonly_service_off.gif"
   img19off = new Image();  img19off.src = "images/subnav_academy_training_off.gif";
   img20off = new Image();  img20off.src = "images/vt_previous_off.gif";
   img21off = new Image();  img21off.src = "images/vt_next_off.gif";

	}

// on images
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// off images
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }

}