preloadImg("home_off", "img/b_home_off.gif");
	preloadImg("home_on",  "img/b_home_on.gif");
	preloadImg("about_off", "img/b_about_off.gif");
	preloadImg("about_on",  "img/b_about_on.gif");
	preloadImg("expertise_off", "img/b_expertise_off.gif");
	preloadImg("expertise_on",  "img/b_expertise_on.gif");
	preloadImg("media_off", "img/b_media_off.gif");
	preloadImg("media_on",  "img/b_media_on.gif");
	preloadImg("contact_off", "img/b_contact_off.gif");
	preloadImg("contact_on",  "img/b_contact_on.gif");
	preloadImg("careers_off", "img/b_careers_off.gif");
	preloadImg("careers_on",  "img/b_careers_on.gif");
	preloadImg("sitemap_off", "img/b_sitemap_off.gif");
	preloadImg("sitemap_on",  "img/b_sitemap_on.gif");
	preloadImg("track_on",  "img/b_track_on.gif");
	preloadImg("track_off", "img/b_track_off.gif");
	preloadImg("elogistics_on",  "img/b_elogistics_on.gif");
	preloadImg("elogistics_off", "img/b_elogistics_off.gif");
	preloadImg("arrow_off", "img/arrow_off.gif");
	preloadImg("arrow_on",  "img/arrow_on.gif");
	preloadImg("arrow_off_left", "img/arrow_off_left.gif");
	preloadImg("arrow_on_left",  "img/arrow_on_left.gif");
	preloadImg("arrow_off_blue", "img/arrow_off_blue.gif");
	preloadImg("arrow_on_blue",  "img/arrow_on_blue.gif");