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) {
		nav_home_over = newImage("images/nav-home-on.gif");
		nav_about_over = newImage("images/nav-about-on.gif");
		nav_menu_over = newImage("images/nav-menu-on.gif");
		nav_beverages_over = newImage("images/nav-beverages-on.gif");
		nav_desserts_over = newImage("images/nav-desserts-on.gif");
		nav_directions_over = newImage("images/nav-directions-on.gif");
		nav_gift_certs_over = newImage("images/nav-gift-certs-on.gif");
		title_menu_lunch_over = newImage("images/title-menu-lunch-on.gif");
		title_menu_dinner_over = newImage("images/title-menu-dinner-on.gif");		
		title3_01_over = newImage("images/title3_01-over.gif");		
		preloadFlag = true;
	}
}