adres = new Array(2);
banner = new Array(2);

adres[0] = "http://www.wapro.pl/oferta/wffakirwprestiz.php";
banner[0] = "http://www.wodzislaw.org.pl/reklama/finanse_wffakir.jpg";
adres[1] = "http://banery.netart.pl/baner_redirect.php?h=1&id_bl=21869&id_bb=211";
banner[1] = "http://banery.netart.pl/baner_show.php?h=1&id_bl=21869&id_bb=211";


nr = Math.floor(Math.random() * (adres.length+1));
if(nr >= adres.length) nr = 0;
document.write("<CENTER>");
document.write("<a href='"+adres[nr]+"' target='_blank'><img src='"+banner[nr]+"'  border=0></a></CENTER>");