if (document.images) {

// TOP NAV OFF GIFS
    img1off = new Image();
    img1off.src = "images/main_nav/home.gif";
    img2off = new Image();
    img2off.src = "images/main_nav/about_nexus.gif";
    img3off = new Image();
    img3off.src = "images/main_nav/services.gif";  
    img4off = new Image();
    img4off.src = "images/main_nav/esolutions.gif";
    img5off = new Image();
    img5off.src = "images/main_nav/interactive.gif";            
    img6off = new Image();
    img6off.src = "images/main_nav/contact.gif";  

      
// TOP NAV ON GIFS
    img1on = new Image();
    img1on.src = "images/main_nav/home_o.gif";
    img2on = new Image();
    img2on.src = "images/main_nav/about_nexus_o.gif";
    img3on = new Image();
    img3on.src = "images/main_nav/services_o.gif";
    img4on = new Image();
    img4on.src = "images/main_nav/esolutions_o.gif";
    img5on = new Image();
    img5on.src = "images/main_nav/interactive_o.gif";
    img6on = new Image();
    img6on.src = "images/main_nav/contact_o.gif";
     
    
// BOTTOM NAV OFF GIFS
    img1btmoff = new Image();
    img1btmoff.src = "images/btm_nav/aus_btmnav_sitemap.gif";
    img2btmoff = new Image();
    img2btmoff.src = "images/btm_nav/aus_btmnav_trading.gif";
    img3btmoff = new Image();
    img3btmoff.src = "images/btm_nav/aus_btmnav_legals.gif";  
      
// BOTTOM NAV ON GIFS
    img1btmon = new Image();
    img1btmon.src = "images/btm_nav/aus_btmnav_sitemap_o.gif";
    img2btmon = new Image();
    img2btmon.src = "images/btm_nav/aus_btmnav_trading_o.gif";
    img3btmon = new Image();
    img3btmon.src = "images/btm_nav/aus_btmnav_legals_o.gif";  


// GALLERY OFF GIFS
   	img1galoff = new Image();
    img1galoff.src = "images/gallery/gallery01.gif";
    img2galoff = new Image();
    img2galoff.src = "images/gallery/gallery02.gif";
    img3galoff = new Image();
    img3galoff.src = "images/gallery/gallery03.gif";
    img4galoff = new Image();
    img4galoff.src = "images/gallery/gallery04.gif";
    img5galoff = new Image();
    img5galoff.src = "images/gallery/gallery05.gif";
    img6galoff = new Image();
    img6galoff.src = "images/gallery/gallery06.gif";
    img7galoff = new Image();
    img7galoff.src = "images/gallery/gallery07.gif";
    img8galoff = new Image();
    img8galoff.src = "images/gallery/gallery08.gif";
    img9galoff = new Image();
    img9galoff.src = "images/gallery/gallery09.gif";
    img10galoff = new Image();
    img10galoff.src = "images/gallery/gallery10.gif";

// GALLERY ON GIFS
    img1galon = new Image();
    img1galon.src = "images/gallery/gallery01r.gif";
    img2galon = new Image();
    img2galon.src = "images/gallery/gallery02r.gif";
    img3galon = new Image();
    img3galon.src = "images/gallery/gallery03r.gif";
    img4galon = new Image();
    img4galon.src = "images/gallery/gallery04r.gif";
    img5galon = new Image();
    img5galon.src = "images/gallery/gallery05r.gif";
    img6galon = new Image();
    img6galon.src = "images/gallery/gallery06r.gif";
    img7galon = new Image();
    img7galon.src = "images/gallery/gallery07rr.gif";
    img8galon = new Image();
    img8galon.src = "images/gallery/gallery08rr.gif";
    img9galon = new Image();
    img9galon.src = "images/gallery/gallery09rr.gif";
    img10galon = new Image();
    img10galon.src = "images/gallery/gallery10r.gif";
}


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

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