images = new Array(2);

images[0] = "<a href = 'http://www.designbyml.com/'><img src='http://www.juniorbelfastgiants.com/rotator/3post.jpg' alt='DesignByML - Affordable Graphic &amp; Web Design'></a>";

images[1] = "<a href = 'http://www.juniorbelfastgiants.com/advertise'><img src='http://www.juniorbelfastgiants.com/rotator/1post.jpg' alt='Click here for more information about advertising with us.'></a>";

images[2] = "<a href = 'http://www.easyfundraising.org.uk/belfastgiants'><img src='http://www.juniorbelfastgiants.com/rotator/2post.jpg' alt='Junior Belfast Giants EasyFundraising'></a>";

images[3] = "<a href = 'http://www.easyfundraising.org.uk/belfastgiants'><img src='http://www.juniorbelfastgiants.com/rotator/2post.jpg' alt='Junior Belfast Giants EasyFundraising'></a>";

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

document.write(images[index]);