var ilosc = 2;
var losuj = Math.floor(ilosc*Math.random());

if(losuj==0)
tresc = '<a href="med.htm" target="_blank"><img src="banner/media.gif" border="0" alt="media, telewizja, radio - aktualne i ciekawe informacje"></a>';
else

if(losuj==1)
tresc = '<a href="shc.htm" target="_blank"><img src="banner/em-fm.png" border="0" alt="EMSoft Media - wszystko o radiu w Internecie"></a>';
;

document.write(tresc);