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) {
		Navi_home_down = newImage("Bilder/Navi_home-down.gif");
		navi_angeb_down = newImage("Bilder/navi_angeb-down.gif");
		Navi_projekte_down = newImage("Bilder/Navi_projekte-down.gif");
		Navi_team_down = newImage("Bilder/Navi_team-down.gif");
		navi_kontakt_down = newImage("Bilder/navi_kontakt-down.gif");
		navi_tuts_down = newImage("Bilder/navi_tuts-down.gif");
		navi_links_down = newImage("Bilder/navi_links-down.gif");
		navi_impress_down = newImage("Bilder/navi_impress-down.gif");
		preloadFlag = true;
	}
}