window.addEvent('domready', function () {
    menu = new Menu();
    /* settings */var showDuration = 3000;
    var container = $('slideshow-container');
    var slides = $('slide');
    var numbers = slides.getElements('span');
    var images = container.getElements('img');
    var currentIndex = 0;
    var interval;
    /* opacity and fade */
    images.each(function (img, i) {
        if (i > 0) { img.set('opacity', 0); }
    });
    /* worker */
    var show = function () {
        images[currentIndex].fade('out');
        numbers[currentIndex].addClass("white");
        if (currentIndex == 0) { numbers[3].removeClass("white"); } else {
            numbers[currentIndex - 1].removeClass("white");
        }
        images[currentIndex = currentIndex < images.length - 1 ? currentIndex + 1 : 0].fade('in');

    };
    /* start once the page is finished loading */
    window.addEvent('load', function () { interval = show.periodical(showDuration); });

});