var banner = new Array();

banner.push('https://i.imgur.com/4xbjx.png');
banner.push('https://i.imgur.com/C3L94.png');
banner.push('https://i1098.photobucket.com/albums/g379/aaron4u1/585420Sanstitre41.png');





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