if (document.images) {
   img1on = new Image(); img1on.src = "img/1_2.jpg";
   img2on = new Image(); img2on.src = "img/2_2.jpg";
   img3on = new Image(); img3on.src = "img/3_2.jpg";
   img4on = new Image(); img4on.src = "img/4_2.jpg";
   img5on = new Image(); img5on.src = "img/5_2.jpg";
   img6on = new Image(); img6on.src = "img/6_2.jpg";
   img7on = new Image(); img7on.src = "img/7_2.jpg";
   img8on = new Image(); img8on.src = "img/8_2.jpg";
   img9on = new Image(); img9on.src = "img/9_2.jpg";
   img31on = new Image(); img31on.src = "3/img/31_2.jpg";
   img32on = new Image(); img32on.src = "3/img/32_2.jpg";
   img33on = new Image(); img33on.src = "3/img/33_2.jpg";
   img34on = new Image(); img34on.src = "3/img/34_2.jpg";
   img35on = new Image(); img35on.src = "3/img/35_2.jpg";
   img36on = new Image(); img36on.src = "3/img/36_2.jpg";
   home1on = new Image(); home1on.src = "img/home2.gif";

   img1off = new Image(); img1off.src = "img/1_1.jpg";
   img2off = new Image(); img2off.src = "img/2_1.jpg";
   img3off = new Image(); img3off.src = "img/3_1.jpg";
   img4off = new Image(); img4off.src = "img/4_1.jpg";
   img5off = new Image(); img5off.src = "img/5_1.jpg";
   img6off = new Image(); img6off.src = "img/6_1.jpg";
   img7off = new Image(); img7off.src = "img/7_1.jpg";
   img8off = new Image(); img8off.src = "img/8_1.jpg";
   img9off = new Image(); img9off.src = "img/9_1.jpg";
   img31off = new Image(); img31off.src = "3/img/31_1.jpg";
   img32off = new Image(); img32off.src = "3/img/32_1.jpg";
   img33off = new Image(); img33off.src = "3/img/33_1.jpg";
   img34off = new Image(); img34off.src = "3/img/34_1.jpg";
   img35off = new Image(); img35off.src = "3/img/35_1.jpg";
   img36off = new Image(); img36off.src = "3/img/36_1.jpg";
   home1off = new Image(); home1off.src = "img/home1.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");
        }
}