images = new Array(2);

images[0] = "<a href = 'http://www.absolutemario.com'><img border='0' src='http://i102.photobucket.com/albums/m89/Purple256/am_banner.png' alt='Your absolute authority on Mario.'></a>";

images[1] = "<a href = 'http://www.absolutemario.com'><img border='0' src='http://i102.photobucket.com/albums/m89/Purple256/am_banner.png' alt='Your absolute authority on Mario.'></a>";

index = Math.floor(Math.random() * images.length);

document.write(images[index]);