if (document.images) {
   img1 = new Image(); img1.src = "top/b1_2.jpg";
   img2 = new Image(); img2.src = "top/b2_2.jpg";
   img3 = new Image(); img3.src = "top/b3_2.jpg";
   img4 = new Image(); img4.src = "top/b4_2.jpg";
   img5 = new Image(); img5.src = "top/b5_2.jpg";
   img6 = new Image(); img6.src = "top/b6_2.jpg";
   img7 = new Image(); img7.src = "top/b7_2.jpg";
   img8 = new Image(); img8.src = "top/b8_2.jpg";
   img9 = new Image(); img9.src = "top/b9_2.jpg";
   img10 = new Image(); img10.src = "top/b10_2.jpg";

}
function setImage(img, image) {
   if (img) {
      img.src = image;
   }
}