var banner = new Array();

banner[0]='http://img10.imageshack.us/img10/3171/banerrutii.jpg';
banner[1]='http://img232.imageshack.us/img232/5965/bannercavies.gif';
banner[2]='http://img443.imageshack.us/img443/3328/logoprimavera3.png';
banner[3]='http://img443.imageshack.us/img443/4318/banertaicks.jpg';
banner[4]='http://img508.imageshack.us/img508/4482/banerzoe10022.jpg';
banner[5]='http://img99.imageshack.us/img99/433/bannerzoe1002.jpg';
banner[6]='http://img85.imageshack.us/img85/1708/banersw33tbunny.png';
banner[7]='http://img156.imageshack.us/img156/9826/baneragnetha1.png';
banner[8]='http://img38.imageshack.us/img38/2619/baneragnetha2.png';

document.getElementById('logo').firstChild.src= banner[Math.floor(Math.random()*banner.length)];