if(navigator.appVersion.charAt(0) >= 3) {
  var img = new Array();
  img[0] = new Image();  img[0].src = "/images/b_product.gif";
  img[1] = new Image();  img[1].src = "/images/b_product2.gif";
  img[2] = new Image();  img[2].src = "/images/b_company.gif";
  img[3] = new Image();  img[3].src = "/images/b_company2.gif";
  img[4] = new Image();  img[4].src = "/images/b_photo.gif";
  img[5] = new Image();  img[5].src = "/images/b_photo2.gif";
  img[6] = new Image();  img[6].src = "/images/b_recruit.gif";
  img[7] = new Image();  img[7].src = "/images/b_recruit2.gif";
  img[8] = new Image();  img[8].src = "/images/b_iso.gif";
  img[9] = new Image();  img[9].src = "/images/b_iso2.gif";
  img[10] = new Image();  img[10].src = "/images/b_sitemap.gif";
  img[11] = new Image();  img[11].src = "/images/b_sitemap2.gif";
  img[12] = new Image();  img[12].src = "/images/b_blog.gif";
  img[13] = new Image();  img[13].src = "/images/b_blog2.gif";
}
function change_image(nam,num) {
  if(navigator.appVersion.charAt(0) >= 3) {
    document.images[nam].src = img[num].src;
  }
}