var banner = new Array();

banner.push('https://i.servimg.com/u/f67/14/07/83/56/018_bm17.jpg');
banner.push('https://i.servimg.com/u/f67/14/07/83/56/sans_159.jpg');
banner.push('https://i.servimg.com/u/f67/14/07/83/56/header10.jpg');

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

var banner = new Array();

banner.push('https://i.servimg.com/u/f67/14/07/83/56/018_bm17.jpg');
banner.push('https://i.servimg.com/u/f67/14/07/83/56/sans_159.jpg');
banner.push('https://i.servimg.com/u/f67/14/07/83/56/header10.jpg');

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