var banner = new Array();

banner[0]='https://i.servimg.com/u/f68/13/55/65/56/fondon10.jpg';
banner[1]='https://i.servimg.com/u/f35/13/55/65/56/banner10.jpg';
banner[2]='https://i.servimg.com/u/f68/13/55/65/56/area110.jpg';
banner[3]='https://i.servimg.com/u/f68/13/55/65/56/area310.jpg';


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