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_nieves_on.gif";
            img2off = new Image();
            img2off.src = "images/menu_nieves.gif";
            img3on = new Image();
            img3on.src = "images/menu_weaving_on.gif";
            img3off = new Image();
            img3off.src = "images/menu_weaving.gif";
            img4on = new Image();
            img4on.src = "images/menu_shibori_on.gif";
            img4off = new Image();
            img4off.src = "images/menu_shibori.gif";
            img5on = new Image();
            img5on.src = "images/menu_shibori_weaving_on.gif";
            img5off = new Image();
            img5off.src = "images/menu_shibori_weaving.gif";
            img6on = new Image();
            img6on.src = "images/menu_shibori_stitching_on.gif";
            img6off = new Image();
            img6off.src = "images/menu_shibori_stitching.gif";
            img7on = new Image();
            img7on.src = "images/menu_news_on.gif";
            img7off = new Image();
            img7off.src = "images/menu_news.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_back_on.gif";
            img9off = new Image();
            img9off.src = "images/menu_back.gif";
            img10on = new Image();
            img10on.src = "images/menu_forward_on.gif";
            img10off = new Image();
            img10off.src = "images/menu_forward.gif";
            img11on = new Image();
            img11on.src = "images/detail_button_on.gif";
            img11off = new Image();
            img11off.src = "images/detail_button.gif";
            img12on = new Image();
            img12on.src = "images/full_button_on.gif";
            img12off = new Image();
            img12off.src = "images/full_button.gif";
            img13on = new Image();
            img13on.src = "images/index_shibori_on.jpg";
            img13off = new Image();
            img13off.src = "images/index_shibori.jpg";
            img14on = new Image();
            img14on.src = "images/index_weaving_on.jpg";
            img14off = new Image();
            img14off.src = "images/index_weaving.jpg";
            img15on = new Image();
            img15on.src = "images/index_shibori_stitching_on.jpg";
            img15off = new Image();
            img15off.src = "images/index_shibori_stitching.jpg";
            img16on = new Image();
            img16on.src = "images/index_shibori_weaving_on.jpg";
            img16off = new Image();
            img16off.src = "images/index_shibori_weaving.jpg";
            img17on = new Image();
            img17on.src = "images/more_button_on.gif";
            img17off = new Image();
            img17off.src = "images/more_button.gif";
            img18on = new Image();
            img18on.src = "images/previous_button_on.gif";
            img18off = new Image();
            img18off.src = "images/previous_button.gif";
            img19on = new Image();
            img19on.src = "images/home_shibstitch1_on.jpg";
            img19off = new Image();
            img19off.src = "images/home_shibstitch1.jpg";
            img20on = new Image();
            img20on.src = "images/home_shibstitch2_on.jpg";
            img20off = new Image();
            img20off.src = "images/home_shibstitch2.jpg";
            img21on = new Image();
            img21on.src = "images/menu_shibori_washi_on.gif";
            img21off = new Image();
            img21off.src = "images/menu_shibori_washi.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");
        }
}