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')
        .fadeTo(750, 1.0, function() {
            $active.removeClass('active last-active');
        });
}

$(function () {
    setInterval("slideSwitch()", 4500 );
});