var banner = new Array();
 
banner.push('https://zupimages.net/up/20/10/2llo.png');
banner.push('https://zupimages.net/up/20/10/l1mt.png');
banner.push('https://zupimages.net/up/20/10/nbux.png');
 
document.getElementById('i_logo').src= banner[Math.floor(Math.random()*banner.length)];