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) {
		menu_home_over = newImage("images/menu_home-over.jpg");
		menu_director_over = newImage("images/menu_director-over.jpg");
		menu_components_over = newImage("images/menu_components-over.jpg");
		menu_internship_over = newImage("images/menu_internship-over.jpg");
		menu_events_over = newImage("images/menu_events-over.jpg");
		menu_news_over = newImage("images/menu_news-over.jpg");
		menu_photos_over = newImage("images/menu_photos-over.jpg");
		menu_project_over = newImage("images/menu_project-over.jpg");
		menu_partner_over = newImage("images/menu_partner-over.jpg");
		menu_links_over = newImage("images/menu_links-over.jpg");
		preloadFlag = true;
	}
}