imgPreload1 = new Image(120, 20);
imgPreload1.src = "assets/images/site/nav/home2_hov.png";

imgPreload2 = new Image(120, 20);
imgPreload2.src = "assets/images/site/nav/art2_hov.png";

imgPreload3 = new Image(120, 20);
imgPreload3.src = "assets/images/site/nav/debbaldwin2_hov.png";

imgPreload4 = new Image(120, 20);
imgPreload4.src = "assets/images/site/nav/contact2_hov.png";

function fncNavRollover(obj) {
    if (obj.src.indexOf("_hov") == -1)
        obj.src = obj.src.replace('.png', '_hov.png');
}

function fncNavRollout(obj) {
    if (obj.src.indexOf("_hov") > -1)
        obj.src = obj.src.replace('_hov.png', '.png');
}