images = new Array(1);

images[0] = "<a href='http://www.videoray.com/categories/overview'><img src='images/heading_photos/underwater-robotics.png' alt='VideoRay - Underwater Robotics' /></a>"

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

document.write("");
document.write("" + "" + images[index] + "");
document.write("");