function image() {};
image = new image();
number = 0;
image[number++] = "<img src='images/boot.jpg' border='0'>"
image[number++] = "<img src='images/candy.jpg' border='0'>"
image[number++] = "<img src='images/panic.jpg' border='0'>"
image[number++] = "<img src='images/piggy.jpg' border='0'>"
increment = Math.floor(Math.random() * number);
document.write(image[increment]);