document.write('<center>'); 
banner = new Array(); 
banner[0] = "<a href=\"strona1.htm\"><img src=\"banner1.jpg\" border=\"0\"></a>"; 
banner[1] = "<a href=\"strona2.htm\"><img src=\"banner2.jpg\" border=\"0\"></a>"; 
banner[2] = "<a href=\"strona3.htm\"><img src=\"banner3.jpg\" border=\"0\"></a>"; 
banner[3] = "<a href=\"strona4.htm\"><img src=\"banner4.jpg\" border=\"0\"></a>"; 
banner[4] = "<a href=\"strona5.htm\"><img src=\"banner5.jpg\" border=\"0\"></a>"; 
banner[5] = "<a href=\"strona6.htm\"><img src=\"banner6.jpg\" border=\"0\"></a>"; 
banner[6] = "<a href=\"strona7.htm\"><img src=\"banner7.jpg\" border=\"0\"></a>"; 
banner[7] = "<a href=\"strona8.htm\"><img src=\"banner8.jpg\" border=\"0\"></a>"; 
banner[8] = "<a href=\"strona9.htm\"><img src=\"banner9.jpg\" border=\"0\"></a>";
banner[9] = "<a href=\"strona10.htm\"><img src=\"banner10.jpg\" border=\"0\"></a>"; 
banner[10] = "<a href=\"strona11.htm\"><img src=\"banner11.jpg\" border=\"0\"></a>";
banner[11] = "<a href=\"strona12.htm\"><img src=\"banner12.jpg\" border=\"0\"></a>"; 
banner[12] = "<a href=\"strona13.htm\"><img src=\"banner13.jpg\" border=\"0\"></a>"; 
banner[13] = "<a href=\"strona14.htm\"><img src=\"banner14.jpg\" border=\"0\"></a>"; 
banner[14] = "<a href=\"strona15.htm\"><img src=\"banner15.jpg\" border=\"0\"></a>"; 
zmiana = Math.floor(Math.random() * banner.length); 
document.write(banner[zmiana]);
document.write('<center>');