if (navigator.appVersion.substring(0,1) >= 3) {

	btn_kontakt				= new Image;
	btn_kontakt.src			= "images/btn_kontakt.gif";
	btn_kontakt_r			= new Image;
	btn_kontakt_r.src		= "images/btn_kontakt_r.gif";

	btn_fotogalerie			= new Image;
	btn_fotogalerie.src		= "images/btn_fotogalerie.gif";
	btn_fotogalerie_r		= new Image;
	btn_fotogalerie_r.src	= "images/btn_fotogalerie_r.gif";

	btn_unser_angebot		= new Image;
	btn_unser_angebot.src	= "images/btn_unser_angebot.gif";
	btn_unser_angebot_r		= new Image;
	btn_unser_angebot_r.src	= "images/btn_unser_angebot_r.gif";

	btn_impressum			= new Image;
	btn_impressum.src		= "images/btn_impressum.gif";
	btn_impressum_r			= new Image;
	btn_impressum_r.src		= "images/btn_impressum_r.gif";

	btn_agb					= new Image;
	btn_agb.src				= "images/btn_agb.gif";
	btn_agb_r				= new Image;
	btn_agb_r.src			= "images/btn_agb_r.gif";

	btn_wir_ueber_uns		= new Image;
	btn_wir_ueber_uns.src	= "images/btn_wir_ueber_uns.gif";
	btn_wir_ueber_uns_r		= new Image;
	btn_wir_ueber_uns_r.src	= "images/btn_wir_ueber_uns_r.gif";

	btn_referenzen			= new Image;
	btn_referenzen.src		= "images/btn_referenzen.gif";
	btn_referenzen_r		= new Image;
	btn_referenzen_r.src	= "images/btn_referenzen_r.gif";

}

function navMouseOver(imgid,imgnew) {
	if (navigator.appVersion.substring(0,1) >= 3) {
		document.images[imgid].src=eval(imgnew + ".src");
	}
}