function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_over = newImage("/images/btn-skip_intro-over.gif");
		intro_over = newImage("/images/btn-view_intro-over.gif");
		aboutus_over = newImage("/images/btn-aboutus-over.gif");
		yachts_over = newImage("/images/btn-yachts-over.gif");
		cruises_over = newImage("/images/btn-cruises-over.gif");
		itineraries_over = newImage("/images/btn-itineraries-over.gif");
		aboutgreece_over = newImage("/images/btn-aboutgreece-over.gif");
		chartering_over = newImage("/images/btn-chartering-over.gif");
		reservations_over = newImage("/images/btn-reservations-over.gif");
		services_over = newImage("/images/btn-services-over.gif");
		links_over = newImage("/images/btn-links-over.gif");
		contact_over = newImage("/images/btn-contact-over.gif");			
		
		gallery_btn_left_gallery_btn_over = newImage("/images/gallery_btn_left-gallery_bt.gif");
		gallery_btn_over = newImage("/images/gallery_btn-over.gif");
		gallery_btn_right_gallery_btn_over = newImage("/images/gallery_btn_right-gallery_b.gif");
		gallery_btn_bot_gallery_btn_over = newImage("/images/gallery_btn_bot-gallery_btn.gif");

		sm_gall_btn_top_sm_gall_btn_over = newImage("images/sm_gall_btn_top-sm_gall_btn.gif");
		sm_gall_btn_left_sm_gall_btn_over = newImage("images/sm_gall_btn_left-sm_gall_bt.gif");
		sm_gall_btn_over = newImage("images/sm_gall_btn-over.gif");
		sm_gall_btn_right_sm_gall_btn_over = newImage("images/sm_gall_btn_right-sm_gall_b.gif");
		sm_gall_btn_bot_sm_gall_btn_over = newImage("images/sm_gall_btn_bot-sm_gall_btn.gif");

		view_fleet_but = newImage("/images/view_our_fleet.gif");
		view_fleet_but_over = newImage("/images/view_our_fleet_over.gif");


		preloadFlag = true;
	}
}

function roll(ob_id, class_name){

	ob = document.getElementById(ob_id);
	ob.className = class_name;
}