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 );});