function image() {
};

image = new image();
number = 0;

// imageArray
image[number++] = "<img src='imgs/random/foto021.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto022.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto023.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto024.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto025.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto026.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto028.jpg' border='0'>"
image[number++] = "<img src='imgs/random/foto029.jpg' border='0'>"


// keep adding items here...

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

document.write(image[increment]);