function image() { }; 
   image = new image();
   number = 0; 
   // imageArray

image[number++] = "<img src='../trofea-ujbuda/photos/f11.jpg' border='0'>"
image[number++] = "<img src='../trofea-ujbuda/photos/f13.jpg' border='0'>"
image[number++] = "<img src='../trofea-ujbuda/photos/f15.jpg' border='0'>"
image[number++] = "<img src='../trofea-ujbuda/photos/f33.jpg' border='0'>"
image[number++] = "<img src='../trofea-ujbuda/photos/f35.jpg' border='0'>"
image[number++] = "<img src='../trofea-ujbuda/photos/f46.jpg' border='0'>"

increment = Math.floor(Math.random() * number);  document.write(image[increment]);