function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages(strOld, strNew) {
	if (document.images && (preloadFlag == true)) {
		document[strOld].src = strNew;
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		team_over = newImage("media/nav/about_over.jpg");
		regulations_over = newImage("media/nav/academics_over.jpg");
		basics_over = newImage("media/nav/admissions_over.jpg");
		firms_over = newImage("media/nav/community_over.jpg");
		library_over = newImage("media/nav/contact_over.jpg");
		news_over = newImage("media/nav/faq_over.jpg");
		press_over = newImage("media/nav/studies_over.jpg");
		preloadFlag = true;
	}
}