function image() { }; 
   image = new image();
   number = 0; 
   // imageArray
image[number++] = "<img src='http://www.tokyohostels.com/pics/backpackers.jpg' width='180' height='284' border='0' alt='Backpacker Hotel'>"
image[number++] = "<img src='http://www.tokyohostels.com/pics/backpackers2.jpg' width='180' height='284' border='0' alt='Backpacker Hotel'>"
image[number++] = "<img src='http://www.tokyohostels.com/pics/backpackers3.jpg' width='180' height='284' border='0' alt='Backpacker Hotel'>"
image[number++] = "<img src='http://www.tokyohostels.com/pics/backpackers4.jpg' width='180' height='284' border='0' alt='Backpacker Hotel'>"
increment = Math.floor(Math.random() * number);  document.write(image[increment]);