var banner = new Array();

banner.push('https://i221.photobucket.com/albums/dd52/xodramm/Abrosyah5/bannbonnec.png');
banner.push('https://i221.photobucket.com/albums/dd52/xodramm/Abrosyah5/bannbonnec.png');
banner.push('https://i221.photobucket.com/albums/dd52/xodramm/Abrosyah5/bannbonnec.png');
banner.push('https://i221.photobucket.com/albums/dd52/xodramm/Abrosyah5/bannbonnec.png');

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