var banner = new Array();

banner[1]='https://i1338.photobucket.com/albums/o696/Mark_Pochine/2q5Or.png';
banner[2]='https://i1338.photobucket.com/albums/o696/Mark_Pochine/jZ95n.png';
banner[3]='https://i1338.photobucket.com/albums/o696/Mark_Pochine/kNG95.png';
banner[4]='https://i1338.photobucket.com/albums/o696/Mark_Pochine/XFkpe.png';

document.getElementById('logo').firstChild.src= banner[Math.floor(Math.random()*banner.length)];
setInterval("document.getElementById('logo').firstChild.src= banner[Math.floor(Math.random()*banner.length)];",3000);