{
	browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))

	if (browser) {
		home_on = new Image();
		home_on.src = "img/home2.gif";
		home_off = new Image();
		home_off.src = "img/home.gif";
	}

	if (browser) {
		firma_on = new Image();
		firma_on.src = "img/firma2.gif";
		firma_off = new Image();
		firma_off.src = "img/firma.gif";
	}
	
	if (browser) {
		oferta_on = new Image();
		oferta_on.src = "img/oferta2.gif";
		oferta_off = new Image();
		oferta_off.src = "img/oferta.gif";
	}
	
	if (browser) {
		kontakt_on = new Image();
		kontakt_on.src = "img/kontakt2.gif";
		kontakt_off = new Image();
		kontakt_off.src = "img/kontakt.gif";
	}
	
	if (browser) {
		english_on = new Image();
		english_on.src = "img/english2.gif";
		english_off = new Image();
		english_off.src = "img/english.gif";
	}	

}

function change(rys, naco) {
	if (browser) rys.src = naco.src;
	return true;
}