var banner = new Array();

banner[0]='https://i1257.photobucket.com/albums/ii503/simscocco/Imagenes%20Del%20Foro%201/Screenshot-38.jpg';
banner[1]='https://i1257.photobucket.com/albums/ii503/simscocco/Imagenes%20Del%20Foro%201/SunlitSimsHalloween.jpg';
banner[2]='https://i1257.photobucket.com/albums/ii503/simscocco/Imagenes%20Del%20Foro%201/SunlitSimsHalloween2.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);