var banner = new Array();

banner[0]='https://i.imgur.com/aWho6KX.png';
banner[1]='https://i.imgur.com/LbmDoDt.png';
banner[2]='https://i.imgur.com/qwAPZhj.png';
banner[3]='https://i.imgur.com/YqUIR6C.png';
banner[4]='https://i.imgur.com/M0fN8bO.png';
banner[5]='https://i.imgur.com/JQgmHaZ.png';
banner[6]='https://i.imgur.com/d8RoAxY.png';

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