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) {
		hdr_btn_fav_over = newImage("images/hdr_btn_fav-over.gif");
		menu_main_over = newImage("images/menu_main-over.gif");
		menu_cat_wheel_over = newImage("images/menu_cat_wheel-over.gif");
		menu_cat_disc_over = newImage("images/menu_cat_disc-over.gif");
		menu_cat_accu_over = newImage("images/menu_cat_accu-over.gif");
		menu_deliver_over = newImage("images/menu_deliver-over.gif");
		menu_contacts_over = newImage("images/menu_contacts-over.gif");
		menu_goods_over = newImage("images/menu_goods-over.gif");
		box_go_over = newImage("images/box_go-over.gif");
		preloadFlag = true;
	}
}