var banner = new Array();

banner[0]='http://img824.imageshack.us/img824/7872/31670543.png';
banner[1]='http://img180.imageshack.us/img180/4413/21250565.png';
banner[2]='http://img63.imageshack.us/img63/6655/10an.png';
banner[3]='http://img444.imageshack.us/img444/9157/49520515.png';
banner[4]='http://img517.imageshack.us/img517/1619/30568182.png';
banner[5]='http://img248.imageshack.us/img248/8568/81275454.png';
banner[6]='http://img63.imageshack.us/img63/8617/81468279.png';
banner[7]='http://img176.imageshack.us/img176/5238/17786440.png';
banner[8]='http://img534.imageshack.us/img534/4397/78314600.png';
banner[9]='http://img15.imageshack.us/img15/8228/53460409.png';

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