var rotatingImageCounter = 0;
  new PeriodicalExecuter(function(pe) {
    rotatingImageCounter++;
    try {
      new Effect.Fade($("rollingImage"));
    } catch(err) {
    }
    $("rollingImage").src = "./xml-rpc/random-image.img.php?" + rotatingImageCounter;
    new Effect.Appear($("rollingImage"), { queue: 'end'});
  }, 5);