var banner = new Array();

banner.push('http://s3.noelshack.com/uploads/images/1634657237928_lollipops.png');
banner.push('http://www.noelshack.com/1/1/lollipops-c761999c76.png');

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