if (document.images) {            // Active Images
            img1on = new Image();
            img1on.src = "images/menu_home_on.gif";
            img1off = new Image();
            img1off.src = "images/menu_home.gif";
            img2on = new Image();
            img2on.src = "images/menu_cottage_on.gif";
            img2off = new Image();
            img2off.src = "images/menu_cottage.gif";
            img3on = new Image();
            img3on.src = "images/menu_attractions_on.gif";
            img3off = new Image();
            img3off.src = "images/menu_attractions.gif";
            img4on = new Image();
            img4on.src = "images/menu_swimming_on.gif";
            img4off = new Image();
            img4off.src = "images/menu_swimming.gif";
            img5on = new Image();
            img5on.src = "images/menu_hiking_on.gif";
            img5off = new Image();
            img5off.src = "images/menu_hiking.gif";
            img6on = new Image();
            img6on.src = "images/menu_rates_on.gif";
            img6off = new Image();
            img6off.src = "images/menu_rates.gif";
            img7on = new Image();
            img7on.src = "images/menu_reservations_on.gif";
            img7off = new Image();
            img7off.src = "images/menu_reservations.gif";
            img8on = new Image();
            img8on.src = "images/menu_contact_on.gif";
            img8off = new Image();
            img8off.src = "images/menu_contact.gif";
            img9on = new Image();
            img9on.src = "images/menu_getting_on.gif";
            img9off = new Image();
            img9off.src = "images/menu_getting.gif";
            img10on = new Image();
            img10on.src = "images/menu_links_on.gif";
            img10off = new Image();
            img10off.src = "images/menu_links.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");
        }
}