function slideSwitch ()
{
  var $active = $("#slideshow img.active");

  if ($active.length == 0)
    $active = $("#slideshow img:last");

  var $next = $active.next ().length ? $active.next () : $("#slideshow img:first");

  $active.addClass ("last-active");
  $next.css({opacity: 0.0})
       .addClass("active")
       .animate({opacity: 1.0}, 1000, function () { $active.removeClass ("active last-active"); });
}

$(function () { setInterval ("slideSwitch ()", 5000 ); });