<!--

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) {
		about_over = newImage("art/nav/btn_about-over.gif");
		about_staff_over = newImage("art/nav/btn_contact-over.gif");
		news_over = newImage("art/nav/btn_news-over.gif");
		involve_over = newImage("art/nav/btn_involve-over.gif");
		research_over = newImage("art/nav/btn_research-over.gif");
		teaching_over = newImage("art/nav/btn_teaching-over.gif");
		publications_over = newImage("art/nav/btn_publications-over.gif");
		prod_products_over = newImage("art/nav/b_prod_products-over.gif");
		prod_literature_over = newImage("art/nav/b_prod_literature-over.gif");
		prod_downloads_over = newImage("art/nav/b_prod_downloads-over.gif");
		
		preloadFlag = true;
	}
}

// -->