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');
        });
}

$(document).ready(function() {
	$('.post img').wrapAll('<div id="slideshow"></div>');
	$('.post img:first').addClass('active');

	var $totalImagenes = $('.post img').length;
	if ($totalImagenes > 1) {
		setInterval("slideSwitch()", 5000);
	}
	else {
	}

});