if (document.images) {

img1on = new Image();           // On images
img1on.src = "graphics/nav-home-on.gif";
img2on = new Image();
img2on.src = "/graphics/nav-philosophy-on.gif";
img3on = new Image();
img3on.src = "/graphics/nav-practitioners-on.gif";
img4on = new Image();
img4on.src = "/graphics/nav-chinese-on.gif";
img5on = new Image();
img5on.src = "/graphics/nav-products-on.gif";
img6on = new Image();
img6on.src = "/graphics/nav-resources-on.gif";
img7on = new Image();
img7on.src = "/graphics/nav-faq-on.gif";
img8on = new Image();
img8on.src = "/graphics/nav-painclinic-on.gif";
img9on = new Image();
img9on.src = "/graphics/nav-fertility-on.gif";
img10on = new Image();
img10on.src = "/graphics/nav-events-on.gif";
img11on = new Image();
img11on.src = "/graphics/nav-contact-on.gif";


img1off = new Image();          // Off images
img1off.src = "/graphics/nav-home.gif";
img2off = new Image();
img2off.src = "/graphics/nav-philosophy.gif";
img3off = new Image();
img3off.src = "/graphics/nav-practitioners.gif";
img4off = new Image();
img4off.src = "/graphics/nav-chinese.gif";
img5off = new Image();
img5off.src = "/graphics/nav-products.gif";
img6off = new Image();
img6off.src = "/graphics/nav-resources.gif";
img7off = new Image();
img7off.src = "/graphics/nav-faq.gif";
img8off = new Image();
img8off.src = "/graphics/nav-painclinic.gif";
img9off = new Image();
img9off.src = "/graphics/nav-fertility.gif";
img10off = new Image();
img10off.src = "/graphics/nav-events.gif";
img11off = new Image();
img11off.src = "/graphics/nav-contact.gif";

}

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

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