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) {
		menu_buttons_roll_01_over = newImage("images/menu_buttons_roll_01-over.gif");
		menu_buttons_roll_02_over = newImage("images/menu_buttons_roll_02-over.gif");
		menu_buttons_roll_02_menu_buttons_roll_03_over = newImage("images/menu_buttons_roll_02-menu_b.gif");
		menu_buttons_roll_03_over = newImage("images/menu_buttons_roll_03-over.gif");
		menu_buttons_roll_03_menu_buttons_roll_04_over = newImage("images/menu_buttons_roll_03-menu_b.gif");
		menu_buttons_roll_04_over = newImage("images/menu_buttons_roll_04-over.gif");
		menu_buttons_roll_04_menu_buttons_roll_05_over = newImage("images/menu_buttons_roll_04-menu_b.gif");
		menu_buttons_roll_05_over = newImage("images/menu_buttons_roll_05-over.gif");
		menu_buttons_roll_05_menu_buttons_roll_06_over = newImage("images/menu_buttons_roll_05-menu_b.gif");
		menu_buttons_roll_06_over = newImage("images/menu_buttons_roll_06-over.gif");
		menu_buttons_roll_06_menu_buttons_roll_07_over = newImage("images/menu_buttons_roll_06-menu_b.gif");
		menu_buttons_roll_07_over = newImage("images/menu_buttons_roll_07-over.gif");
		menu_buttons_roll_07_menu_buttons_roll_08_over = newImage("images/menu_buttons_roll_07-menu_b.gif");
		menu_buttons_roll_08_over = newImage("images/menu_buttons_roll_08-over.gif");
		preloadFlag = true;
	}
}