//ナビゲーションonmouse画像
function preloadNavi() {
  preloadImages(
    'nmhp_htdocs/image/top/top_imode_o.gif',
    'nmhp_htdocs/image/top/top_ezweb_o.gif',
    'nmhp_htdocs/image/top/top_vodafone_o.gif',
    'nmhp_htdocs/image/top/top_lmode_o.gif'
  );
}