(function ($) {
    if ($(window).width() < 520) {
        var didScroll;
        var lastScrollTop = 0;
        var delta = 5;
        // on scroll, let the interval function know the user has scrolled
        $(window).scroll(function (event) {
            didScroll = true;
        });
        // run hasScrolled() and reset didScroll status
        setInterval(function () {
            if (didScroll) {
                hasScrolled();
                didScroll = false;
            }
        }, 250);
        function hasScrolled() {
            var st = $(this).scrollTop();

            // Make sure they scroll more than delta
            if (Math.abs(lastScrollTop - st) <= delta)
                return;

            // If they scrolled down and are past the navbar, add class .nav-up.
            // This is necessary so you never see what is "behind" the navbar.
            if (st > lastScrollTop) {
                // Scroll Down
                $('#kiwixtoolbar').css({ top: '-100%' });
            } else {
                // Scroll Up
                $('#kiwixtoolbar').css({ top: '0' });
            }

            lastScrollTop = st;
        }
    }

    $('#kiwixsearchbox').on({
        focus: function () {
            $('.kiwix_searchform').addClass('full_width');
            $('label[for="kiwix_button_show_toggle"], .kiwix_button_cont').addClass('searching');
        },
        blur: function () {
            $('.kiwix_searchform').removeClass('full_width');
            $('label[for="kiwix_button_show_toggle"], .kiwix_button_cont').removeClass('searching');
        }
    });
})(jQuery);