if (document.images) {
    var img1 = new Image(40, 40);
    img1src = "leftbg.gif";
    
    var img2 = new Image(40, 40);
    img2.src = "rightbg.gif";
    
    var img3 = new Image(36, 16);
    img3.src = "leftbg-flash.gif";
    
    var img4 = new Image(36, 16);
    img4.src = "rightbg-flash.gif";
    
    var img5 = new Image(625, 18);
    img5.src = "footer.gif";
}