if (document.images) {
    pic1 = new Image(160, 61);
    pic1.src = "images/top_nav_02_01b.png";

    pic2 = new Image(197, 61);
    pic2.src = "images/top_nav_02_02b.png";

    pic3 = new Image(208, 61);
    pic3.src = "images/top_nav_02_03b.png";

    pic4 = new Image(108, 61);
    pic4.src = "images/top_nav_02_04b.png";

    pic5 = new Image(215, 61);
    pic5.src = "images/top_nav_02_05b.png";

    pic6 = new Image(153, 64);
    pic6.src = "images/bottom_nav_on_01.png";

    pic7 = new Image(146, 64);
    pic7.src = "images/bottom_nav_on_02.png";

    pic8 = new Image(146, 64);
    pic8.src = "images/bottom_nav_on_03.png";

    pic9 = new Image(145, 64);
    pic9.src = "images/bottom_nav_on_04.png";

    pic10 = new Image(154, 64);
    pic10.src = "images/bottom_nav_on_05.png";
}