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) {
		home_over = newImage("images/home-over.gif");
		home_about_over = newImage("images/home-about_over.gif");
		about_home_over = newImage("images/about-home_over.gif");
		about_over = newImage("images/about-over.gif");
		about_journal_over = newImage("images/about-journal_over.gif");
		journal_about_over = newImage("images/journal-about_over.gif");
		journal_over = newImage("images/journal-over.gif");
		journal_history_over = newImage("images/journal-history_over.gif");
		history_journal_over = newImage("images/history-journal_over.gif");
		history_over = newImage("images/history-over.gif");
		history_links_over = newImage("images/history-links_over.gif");
		links_history_over = newImage("images/links-history_over.gif");
		links_over = newImage("images/links-over.gif");
		links_contact_over = newImage("images/links-contact_over.gif");
		contact_links_over = newImage("images/contact-links_over.gif");
		contact_over = newImage("images/contact-over.gif");
		preloadFlag = true;
	}
}