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) {
		pitch_bio_over = newImage("images/pitch-bio_over.jpg");
		pitch_disco_over = newImage("images/pitch-disco_over.jpg");
		pitch_contact_over = newImage("images/pitch-contact_over.jpg");
		pitch_links_over = newImage("images/pitch-links_over.jpg");
		news_over = newImage("images/news-over.jpg");
		bio_over = newImage("images/bio-over.jpg");
		disco_over = newImage("images/disco-over.jpg");
		contact_over = newImage("images/contact-over.jpg");
		links_over = newImage("images/links-over.jpg");
		preloadFlag = true;
	}
}