if (document.images) {
   img1 = new Image(); img1.src = "g/012.gif";
   img2 = new Image(); img2.src = "g/022.gif";
   img3 = new Image(); img3.src = "g/032.gif";
   img4 = new Image(); img4.src = "g/042.gif";
   img5 = new Image(); img5.src = "g/052.gif";
   img6 = new Image(); img6.src = "g/062.gif";
   img7 = new Image(); img7.src = "g/072.gif";
}
function setImage(img, image) {
   if (img) {
      img.src = image;
   }
}