if (document.images) {
   img1 = new Image(); img1.src = "img/btn_inq_o.gif";
   img2 = new Image(); img2.src = "img/btn_map_o.gif";
   img3 = new Image(); img3.src = "img/btn_sitemap_o.gif";
   img4 = new Image(); img4.src = "img/btn_eng_o.gif";
   img5 = new Image(); img5.src = "img/mnl01_o.gif";
   img6 = new Image(); img6.src = "img/mnl02_o.gif";
   img7 = new Image(); img7.src = "img/mnl03_o.gif";
   img8 = new Image(); img8.src = "img/mnl04_o.gif";
   img9 = new Image(); img9.src = "img/mnl05_o.gif";
   img10 = new Image(); img10.src = "img/mnl06_o.gif";
   img11 = new Image(); img11.src = "img/mn02_01_o.gif";
   img12 = new Image(); img12.src = "img/mn02_02_o.gif";
}
function setImage(img, image) {
   if (img) {
      img.src = image;
   }
}