function preloadTopImages() {
  if (document.images) {
    image1 = new Image();
    image1.src = "images/index/tab_intro_over.gif";
    image2 = new Image();
    image2.src = "images/index/tab_works_over.gif";
    image3 = new Image();
    image3.src = "images/index/tab_world_over.gif";
    image4 = new Image();
    image4.src = "images/index/tab_goods_over.gif";
    image5 = new Image();
    image5.src = "images/index/tab_board_over.gif";
    image5 = new Image();
    image5.src = "images/index/tab_links_over.gif";
    image1 = new Image();
    image1.src = "images/header/title2_intro.gif";
    image2 = new Image();
    image2.src = "images/header/title2_works.gif";
    image3 = new Image();
    image3.src = "images/header/title2_world.gif";
    image4 = new Image();
    image4.src = "images/header/title2_goods.gif";
    image5 = new Image();
    image5.src = "images/header/title2_board.gif";
    image6 = new Image();
    image6.src = "images/header/title2_links.gif";
  }
}

function preloadImages() {
  if (document.images) {
    image1 = new Image();
    image1.src = "../images/header/title2_intro.gif";
    image2 = new Image();
    image2.src = "../images/header/title2_works.gif";
    image3 = new Image();
    image3.src = "../images/header/title2_world.gif";
    image4 = new Image();
    image4.src = "../images/header/title2_goods.gif";
    image5 = new Image();
    image5.src = "../images/header/title2_board.gif";
    image6 = new Image();
    image6.src = "../images/header/title2_links.gif";
  }
}