function slideSwitch() {
    var $active = $('#slideshow div.active');

    if ( $active.length == 0 ) $active = $('#slideshow div:last');

    var $next =  $active.next().length ? $active.next()
        : $('#slideshow div:first');

    $active.addClass('last-active');

    $next.animate({opacity: 0}, 1000)
        .addClass('active')
        .animate({opacity: 1}, 1000);
		$active.removeClass('active last-active').animate({opacity: 0}, 1000);

}

$(function() {
    setInterval( "slideSwitch()", 3500 );
});