function image() {
};

image = new image();
number = 0;

// imageArray
image[number++] = "<img src='img/sexmoor01.jpg' border='0'>"
image[number++] = "<img src='img/sexmoor02.jpg' border='0'>"
image[number++] = "<img src='img/sexmoor03.jpg' border='0'>"
image[number++] = "<img src='img/sexmoor04.jpg' border='0'>"
image[number++] = "<img src='img/sexmoor05.jpg' border='0'>"
// keep adding items here...

increment = Math.floor(Math.random() * number);

document.write(image[increment]);