var banner = new Array();

banner[0]='https://i.imgur.com/hjFyV.png';
banner[1]='https://i.imgur.com/G13xb.png';
banner[2]='https://i.imgur.com/tQkPq.png';
banner[3]='https://i.imgur.com/GkgXg.png';
banner[4]='https://imgur.com/9AiRD.png';
banner[5]='https://i.imgur.com/cUaGf.png';

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