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) {
		logo_orthopaedische_praxis_over = newImage("/img/logo_orthopaedische_praxis_over.gif");
		pfeil_blau_over = newImage("/img/pfeil_blau-over.gif");
		pfeil_hellblau_over = newImage("/img/pfeil_hellblau-over.gif");
		pfeil_braun_over = newImage("/img/pfeil_braun-over.gif");
		pfeil_dunkelbraun_over = newImage("/img/pfeil_dunkelbraun-over.gif");
		menu_philosophie_over = newImage("/img/head_menu_philosophie.gif");
		icon_kontakt_over = newImage("/img/icon_kontakt-over.gif");
		icon_impressum_over = newImage("/img/icon_impressum-over.gif");
		icon_glossar_over = newImage("/img/icon_glossar-over.gif");
		icon_sitemap_over = newImage("/img/icon_sitemap-over.gif");
		head_menu_philosophie_over = newImage("/img/head_menu_philosophie-over.gif");
		preloadFlag = true;
	}
}