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')
        .animate({opacity : 0.0}, 2000);

    $next.css({ opacity: 0.0 })
        .addClass('active')
        .animate({ opacity: 1.0 }, 2000, function () {
            $active.removeClass('active last-active');
        });
    }