var menu_sub_01_off = new Image();
  menu_sub_01_off.src = "/images/menu_sub_01_off.jpg";
  var menu_sub_01_over = new Image();
  menu_sub_01_over.src = "/images/menu_sub_01_over.jpg";

  var menu_sub_02_off = new Image();
  menu_sub_02_off.src = "/images/menu_sub_02_off.jpg";
  var menu_sub_02_over = new Image();
  menu_sub_02_over.src = "/images/menu_sub_02_over.jpg";

  var menu_sub_03_off = new Image();
  menu_sub_03_off.src = "/images/menu_sub_03_off.jpg";
  var menu_sub_03_over = new Image();
  menu_sub_03_over.src = "/images/menu_sub_03_over.jpg";

  var menu_sub_04_off = new Image();
  menu_sub_04_off.src = "/images/menu_sub_04_off.jpg";
  var menu_sub_04_over = new Image();
  menu_sub_04_over.src = "/images/menu_sub_04_over.jpg";

  var menu_sub_05_off = new Image();
  menu_sub_05_off.src = "/images/menu_sub_05_off.jpg";
  var menu_sub_05_over = new Image();
  menu_sub_05_over.src = "/images/menu_sub_05_over.jpg";

  var menu_sub_06_off = new Image();
  menu_sub_06_off.src = "/images/menu_sub_06_off.jpg";
  var menu_sub_06_over = new Image();
  menu_sub_06_over.src = "/images/menu_sub_06_over.jpg";

  var menu_sub_07_off = new Image();
  menu_sub_07_off.src = "/images/menu_sub_07_off.jpg";
  var menu_sub_07_over = new Image();
  menu_sub_07_over.src = "/images/menu_sub_07_over.jpg";

  var menu_sub_08_off = new Image();
  menu_sub_08_off.src = "/images/menu_sub_08_off.jpg";
  var menu_sub_08_over = new Image();
  menu_sub_08_over.src = "/images/menu_sub_08_over.jpg";

  var menu_sub_09_off = new Image();
  menu_sub_09_off.src = "/images/menu_sub_09_off.jpg";
  var menu_sub_09_over = new Image();
  menu_sub_09_over.src = "/images/menu_sub_09_over.jpg";