MM_preloadImages("images/top_nav/nav_top-01.gif","images/top_nav/nav_top-02.gif","images/top_nav/nav_top-03.gif",
								 "images/top_nav/nav_top-04.gif","images/top_nav/nav_top-05.gif","images/top_nav/history_on.gif");
MM_preloadImages("images/side_nav/nav_side-01.gif","images/side_nav/nav_side-07.gif","images/side_nav/nav_side-08.gif",
								 "images/side_nav/nav_side-09.gif");
MM_preloadImages("images/side_nav/st_pop-01.gif","images/side_nav/st_pop-02.gif","images/side_nav/st_pop-03.gif",
								 "images/side_nav/st_pop-04.gif","images/side_nav/c_pop-01.gif","images/side_nav/c_pop-02.gif",
								 "images/side_nav/c_pop-01.gif","images/side_nav/c_pop-04.gif","images/side_nav/aw_pop-01.gif",
								 "images/side_nav/aw_pop-02.gif","images/side_nav/distance_pop-01.gif","images/side_nav/distance_pop-02.gif",
								 "images/side_nav/distance_pop-03.gif","images/side_nav/vehicle_pop-01.gif","images/side_nav/vehicle_pop-02.gif");