function image() {
};

image = new image();
number = 0;

// imageArray
image[number++] = "<img src='images/01.jpg' border='0'>"
image[number++] = "<img src='images/02.jpg' border='0'>"
image[number++] = "<img src='images/03.jpg' border='0'>"
image[number++] = "<img src='images/04.jpg' border='0'>"
image[number++] = "<img src='images/05.jpg' border='0'>"
image[number++] = "<img src='images/06.jpg' border='0'>"
image[number++] = "<img src='images/07.jpg' border='0'>"
image[number++] = "<img src='images/08.jpg' border='0'>"
image[number++] = "<img src='images/09.jpg' border='0'>"
image[number++] = "<img src='images/10.jpg' border='0'>"
image[number++] = "<img src='images/11.jpg' border='0'>"
image[number++] = "<img src='images/12.jpg' border='0'>"
image[number++] = "<img src='images/13.jpg' border='0'>"
image[number++] = "<img src='images/14.jpg' border='0'>"
image[number++] = "<img src='images/15.jpg' border='0'>"
image[number++] = "<img src='images/16.jpg' border='0'>"
image[number++] = "<img src='images/17.jpg' border='0'>"
image[number++] = "<img src='images/18.jpg' border='0'>"
image[number++] = "<img src='images/19.jpg' border='0'>"
image[number++] = "<img src='images/20.jpg' border='0'>"
image[number++] = "<img src='images/21.jpg' border='0'>"
image[number++] = "<img src='images/22.jpg' border='0'>"
image[number++] = "<img src='images/23.jpg' border='0'>"
image[number++] = "<img src='images/24.jpg' border='0'>"
image[number++] = "<img src='images/25.jpg' border='0'>"
image[number++] = "<img src='images/26.jpg' border='0'>"
image[number++] = "<img src='images/27.jpg' border='0'>"
image[number++] = "<img src='images/28.jpg' border='0'>"

// keep adding items here...

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

document.write(image[increment]);