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_about_over = newImage("images/nav.about-over.jpg");
		nav_screenings_over = newImage("images/nav.screenings-over.jpg");
		nav_news_over = newImage("images/nav.news-over.jpg");
		nav_bands_over = newImage("images/nav.bands-over.jpg");
		nav_book_over = newImage("images/nav.book-over.jpg");
		nav_press_over = newImage("images/nav.press-over.jpg");
		nav_credits_over = newImage("images/nav.credits-over.jpg");
		nav_contact_over = newImage("images/nav.contact-over.jpg");
		preloadFlag = true;
	}
}