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 );
});