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) {
		hb_news_over = newImage("images/hb-news-over.gif");
		hb_calendar_over = newImage("images/hb-calendar-over.gif");
		hb_iris_over = newImage("images/hb-iris-over.gif");
		hb_maps_over = newImage("images/hb-maps-over.gif");
		hb_employment_over = newImage("images/hb-employment-over.gif");
		hb_contact_over = newImage("images/hb-contact-over.gif");
		hb_search_over = newImage("images/hb-search-over.gif");

		f_blue_legal_over = newImage("images/f-blue-legal-over.gif");
		f_blue_privacy_over = newImage("images/f-blue-privacy-over.gif");
		f_blue_disclaimer_over = newImage("images/f-blue-disclaimer-over.gif");
		preloadFlag = true;
	}
}