function image() {
};

image = new image();
number = 0;

image[number++] = "<img src='images/random-animal/1.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/2.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/3.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/4.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/5.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/6.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/7.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/8.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/9.jpg' border='0' alt='Photograph of animal'>"
image[number++] = "<img src='images/random-animal/10.jpg' border='0' alt='Photograph of animal'>"


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

document.write(image[increment]);