var banner = new Array();

banner[0]='http://2.bp.blogspot.com/-ISqjCVw7GBc/UJFIQYGibcI/AAAAAAAAAHo/DDsZXoF7xpw/s1600/LBL+banner.jpg';
banner[1]='http://3.bp.blogspot.com/-Il0wX6kFqqc/UIgfJFubbZI/AAAAAAAAAHA/YGJbQZWIN1g/s1600/LBL+Banner.png';
banner[2]='http://4.bp.blogspot.com/-YBXnhGPYw1E/UJAfehwj7PI/AAAAAAAAAHY/VvOTvyZc56k/s1600/LBL+Banner+3.png';
banner[3]='http://2.bp.blogspot.com/-hWuolTNLJkY/UJAfOU4ahSI/AAAAAAAAAHQ/S-WF9BOD6y4/s1600/LBL+Banner+2.png';

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)];",10000);