var banner = new Array();

banner[0]='https://i774.photobucket.com/albums/yy25/sango_loovee/lala.jpg';
banner[1]='https://i774.photobucket.com/albums/yy25/sango_loovee/fdx.jpg';


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

setInterval("document.getElementById('i_logo').src= banner[Math.floor(Math.random()*banner.length)];",3000);