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');

        });

}