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");
		news_over = newImage("images/news-over.gif");
		calendar_over = newImage("images/calendar-over.gif");
		pubs_over = newImage("images/pubs-over.gif");
		newsletter_over = newImage("images/newsletter-over.gif");
		links_over = newImage("images/links-over.gif");
		training_over = newImage("images/training-over.gif");
		teacher_training_over = newImage("images/teacher_training-over.gif");
		Online_Guides_over = newImage("images/Online-Guides-over.gif");
		RRC_over = newImage("images/RRC-over.gif");
		about_over = newImage("images/about-over.gif");
		Contact_over = newImage("images/Contact-over.gif");
		RRC_Staff_Utilities_over = newImage("images/RRC-Staff-Utilities-over.gif");
		Tech_Help_over = newImage("images/Tech-Help-over.gif");
		preloadFlag = true;
	}
}