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) {
		myTU_over = newImage("/main/images/2ndhead/myTU-over.gif");
		Directory_over = newImage("/main/images/2ndhead/Directory-over.gif");
		calendars_over = newImage("/main/images/2ndhead/calendars-over.gif");
		marketplace_over = newImage("/main/images/2ndhead/marketplace-over.gif");
		library_over = newImage("/main/images/2ndhead/library-over.gif");
		Maps_over = newImage("/main/images/2ndhead/Maps-over.gif");
		search_over = newImage("/main/images/2ndhead/search-over.gif");
		abouttu_over = newImage("/main/images/2ndhead/abouttu-over.gif");
		academics_over = newImage("/main/images/2ndhead/academics-over.gif");
		research_over = newImage("/main/images/2ndhead/research-over.gif");
		admissions_over = newImage("/main/images/2ndhead/admissions-over.gif");
		lifetu_over = newImage("/main/images/2ndhead/lifetu-over.gif");
		artsculture_over = newImage("/main/images/2ndhead/artsculture-over.gif");
		Athletics_over = newImage("/main/images/2ndhead/Athletics-over.gif");
		outreach_over = newImage("/main/images/2ndhead/outreach-over.gif");
		supporttu_over = newImage("/main/images/2ndhead/supporttu-over.gif");
		preloadFlag = true;
	}
}