var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		menu_06_over = newImage("images/menu_06-over.jpg");
		menu_08_over = newImage("images/menu_08-over.jpg");
		menu_13_over = newImage("images/menu_13-over.jpg");
		menu_14_over = newImage("images/menu_14-over.jpg");
		preloadFlag = true;
	}
}