if (document.images) {
    pic2on = new Image(62, 35);
    pic2on.src = "images/nav/nav2_02.jpg";

    pic2off = new Image(62, 35);
    pic2off.src = "images/nav/nav_02.jpg";

    pic3on = new Image(136, 35);
    pic3on.src = "images/nav/nav2_03.jpg";

    pic3off = new Image(136, 35);
    pic3off.src = "images/nav/nav_03.jpg";

    pic4on = new Image(92, 35);
    pic4on.src = "images/nav/nav2_04.jpg";

    pic4off = new Image(92, 35);
    pic4off.src = "images/nav/nav_04.jpg";

    pic5on = new Image(118, 35);
    pic5on.src = "images/nav/nav2_05.jpg";

    pic5off = new Image(118, 35);
    pic5off.src = "images/nav/nav_05.jpg";

    pic6on = new Image(109, 35);
    pic6on.src = "images/nav/nav2_06.jpg";

    pic6off = new Image(109, 35);
    pic6off.src = "images/nav/nav_06.jpg";

    pic7on = new Image(34, 21);
    pic7on.src = "images/download2.jpg";

    pic7off = new Image(34, 21);
    pic7off.src = "images/download.jpg";

    download1 = new Image
    download2 = new Image

    download1.src = 'images/download.jpg'
    download2.src = 'images/download2.jpg'
}
function lightup(imgName) {
    if (document.images) {
        imgOn = eval(imgName + "on.src");
        document[imgName].src = imgOn;
    }
}

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