var banner = new Array();

banner[0]='http://i39.tinypic.com/2q0lrid.jpg';
banner[1]='http://i40.tinypic.com/2z4iw7c.jpg';
banner[2]='http://i44.tinypic.com/2w2ocua.jpg';
banner[3]='http://i56.tinypic.com/t0tfdy.jpg'
banner[4]='http://i53.tinypic.com/ofuc00.jpg';


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

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