(function($) {
    var org_self;

    $.fn.slideshow = function(opt) {
        org_self = $(this);
        var times = eval(opt) * 1000;
        $(org_self).find('div').css({ opacity: 0.0 });
        $(org_self).find('div:first').css({ opacity: 1.0 });
        setInterval('$.fn.gallery()', times);
    }

    $.fn.gallery = function() {
        if ($(org_self).find('div').hasClass('show')) {
            var current = $(org_self).find('div.show');
        } else {
            var current = $(org_self).find('div:first');
        }

        if ($(current).next().length) {
            $(current).next().addClass('show').animate({ opacity: 1.0 }, 1000);
        } else {
            $(org_self).find('div:first').addClass('show').animate({ opacity: 1.0 }, 1000);
        }

        $(current).animate({ opacity: 0.0 }, 1000).removeClass('show');
    }

})(jQuery);