function preloader() {
	if (document.images) {
	//sub navigation
	nav_elearn_r = newImage("/images/learning/nav_elearn_r.gif");
	nav_community_r = newImage("/images/learning/nav_community_r.gif");
	nav_reg_r = newImage("/images/learning/nav_reg_rgif");
	nav_cert_r = newImage("/images/learning/nav_cert_rgif");
	nav_truck_r = newImage("/images/learning/nav_truck_r.gif");
	nav_elder_r = newImage("/images/learning/nav_elder_r.gif");
	nav_continue_r = newImage("/images/learning/nav_continue_rgif");
	nav_other_r = newImage("/images/learning/nav_other_r.gif");
	
	preloadFlag = true
	}
}