function slideSwitch() {
    var $active = $('#collaboration-media img.active');
    if ($active.length == 0) $active = $('#collaboration-media img:last');
    var $next = $active.next().length ? $active.next() : $('#collaboration-media 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);
});