var banner = new Array();

banner[0]='http://imageshack.us/a/img233/1907/velhaerabanner1.gif';

banner[1]='http://img836.imageshack.us/img836/3231/velhaerabanner2.gif';

banner[2]='http://img542.imageshack.us/img542/3250/velhaerabanner3.gif';

banner[3]='http://img827.imageshack.us/img827/9912/velhaerabanner4.gif';

banner[4]='http://img850.imageshack.us/img850/8366/velhaerabanner5.gif';

banner[5]='http://img210.imageshack.us/img210/5651/velhaerabanner6.gif';

banner[6]='http://img685.imageshack.us/img685/9034/velhaerabanner7.gif';

banner[7]='http://img825.imageshack.us/img825/9792/velhaerabanner8.gif';



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