function zmien(oper) {
	if(oper==0)
		{
		document.getElementById('mapka').innerHTML = "<div class=\"inside\"><br /><span style=\"margin-left: 30px;\"><a href=\"pizza_wroclaw.html\" class=\"srodek\">Plac Grunwaldzki</a></span><br /><br /><br /><span style=\"margin-left: 190px;\"><a href=\"pizzeria-wroclaw.html\" class=\"srodek\">Szybowcowa</a></span></div>";
		document.getElementById('adres').innerHTML = "";
		}
	if(oper==1)
		{
		obrazek = "<img src=\"intro/mapka.gif\" alt=\"\" style=\"display:block;\"/>";
		document.getElementById('mapka').innerHTML = obrazek;
		obrazek = "<img src=\"intro/adres1.gif\" alt=\"\"/>";
		document.getElementById('adres').innerHTML = obrazek;
		}
	if(oper==2)
		{
		obrazek = "<img src=\"intro/mapka_a.gif\" alt=\"\" style=\"display:block;\"/>";
		document.getElementById('mapka').innerHTML = obrazek;
		obrazek = "<img src=\"intro/adres2.gif\" alt=\"\"/>";
		document.getElementById('adres').innerHTML = obrazek;
		}
}