if (document.images) {
  nav1_f2 = new Image(129 ,26); nav1_f2.src = "../../naviimg/nav1_f2.gif";
  nav1_f1 = new Image(129 ,26); nav1_f1.src = "../../naviimg/nav1.gif";
  nav2_f2 = new Image(128 ,26); nav2_f2.src = "../../naviimg/nav2_f2.gif";
  nav2_f1 = new Image(128 ,26); nav2_f1.src = "../../naviimg/nav2.gif";
  nav3_f2 = new Image(128 ,26); nav3_f2.src = "../../naviimg/nav3_f2.gif";
  nav3_f1 = new Image(128 ,26); nav3_f1.src = "../../naviimg/nav3.gif";
  nav4_f2 = new Image(128 ,26); nav4_f2.src = "../../naviimg/nav4_f2.gif";
  nav4_f1 = new Image(128 ,26); nav4_f1.src = "../../naviimg/nav4.gif";
  nav5_f2 = new Image(128 ,26); nav5_f2.src = "../../naviimg/nav5_f2.gif";
  nav5_f1 = new Image(128 ,26); nav5_f1.src = "../../naviimg/nav5.gif";
  nav6_f2 = new Image(129 ,26); nav6_f2.src = "../../naviimg/nav6_f2.gif";
  nav6_f1 = new Image(129 ,26); nav6_f1.src = "../../naviimg/nav6.gif";
  english_f2 = new Image(57 ,19); english_f2.src = "../../naviimg/english_f2.gif";
  english_f1 = new Image(57 ,19); english_f1.src = "../../naviimg/english.gif";
  }

  if (document.images) {
  l2_a1_f2 = new Image(170 ,18); l2_a1_f2.src = "../../indeximg/l2_a1_f2.gif";
  l2_a1_f1 = new Image(170 ,18); l2_a1_f1.src = "../../indeximg/l2_a1.gif";
  l2_b1_f2 = new Image(170 ,18); l2_b1_f2.src = "../../indeximg/l2_b1_f2.gif";
  l2_b1_f1 = new Image(170 ,18); l2_b1_f1.src = "../../indeximg/l2_b1.gif";
  l2_c1_f2 = new Image(170 ,18); l2_c1_f2.src = "../../indeximg/l2_c1_f2.gif";
  l2_c1_f1 = new Image(170 ,18); l2_c1_f1.src = "../../indeximg/l2_c1.gif";
  l2_d1_f2 = new Image(170 ,18); l2_d1_f2.src = "../../indeximg/l2_d1_f2.gif";
  l2_d1_f1 = new Image(170 ,18); l2_d1_f1.src = "../../indeximg/l2_d1.gif";
  }