var banner = new Array(); banner[0]='https://i.servimg.com/u/f39/18/81/10/75/header11.jpg'; banner[1]='https://i.servimg.com/u/f39/18/81/10/75/header13.jpg'; banner[2]='https://i.servimg.com/u/f39/18/81/10/75/header14.jpg'; document.getElementById('i_logo').src= banner[Math.floor(Math.random()*banner.length)];