var banners = new Array(); 
banners[0] = '<a href="http://www.gamebookers.com/cgi-bin/intro.cgi?promotion=gb_30eu_pl_lp&l=pl&wm=3093042" target="_blank"><img src="http://www.ligibrytyjskie.pl/images/gamebookers_100pln.gif" alt="gamebookers"></a>';
banners[1] = '<script type="text/javascript" src="http://js.affiliatelounge.com/javascript.php?prefix=n7kP3Xu3_Aw79R6Xuh-yI2Nd7ZgqdRLk&amp;media=5493&amp;campaign=1"></script>';
index = Math.floor(Math.random() * banners.length);
document.write(banners[index]);