function rand ( n )
{
  return ( Math.floor ( Math.random ( ) * n + 1 ) );
}


// Store some random image URL's

var random_images = new Array ( );
random_images[0] = "_imgs/photos/sample0.jpg";
random_images[1] = "_imgs/photos/sample1.jpg";
random_images[2] = "_imgs/photos/sample2.jpg";
random_images[3] = "_imgs/photos/sample3.jpg";
random_images[4] = "_imgs/photos/sample4.jpg";
random_images[5] = "_imgs/photos/sample5.jpg";
random_images[6] = "_imgs/photos/sample6.jpg";
random_images[7] = "_imgs/photos/sample7.jpg";
random_images[8] = "_imgs/photos/sample8.jpg";
random_images[9] = "_imgs/photos/sample9.jpg";
random_images[10] = "_imgs/photos/sample10.jpg";
random_images[11] = "_imgs/photos/sample11.jpg";
random_images[12] = "_imgs/photos/sample12.jpg";
random_images[13] = "_imgs/photos/sample13.jpg";
random_images[14] = "_imgs/photos/sample14.jpg";
random_images[15] = "_imgs/photos/sample15.jpg";
random_images[16] = "_imgs/photos/sample16.jpg";
random_images[17] = "_imgs/photos/sample17.jpg";
random_images[18] = "_imgs/photos/sample18.jpg";
random_images[19] = "_imgs/photos/sample19.jpg";
random_images[20] = "_imgs/photos/sample20.jpg";
random_images[21] = "_imgs/photos/sample21.jpg";
random_images[22] = "_imgs/photos/sample22.jpg";
random_images[23] = "_imgs/photos/sample23.jpg";
random_images[24] = "_imgs/photos/sample24.jpg";

// Pick a random image from the list,
// and set the image source to point to the image

function pick_image ( )
{
  document.getElementById("random-image").src = random_images[rand(24)-1];
}