var liSelected;
$(window).keydown(function(e) {
    var li = $('#hostlist .list .thumbnail');
    if (e.which === 40) {
        // cursor down
        if (liSelected) {
            liSelected.removeClass('selected');
            next = liSelected.next();
            if (next.length > 0) {
                liSelected = next.addClass('selected');
            } else {
                liSelected = li.eq(0).addClass('selected');
            }
        } else {
            liSelected = li.eq(0).addClass('selected');
        }

        if (liSelected) {
            $('body').animate({ scrollTop: liSelected.offset().top - 20 },
                              { duration: 500, queue: false });
        }

        return false;
    }

    if (e.which === 38) {
        // cursor up
        if (liSelected) {
            liSelected.removeClass('selected');
            next = liSelected.prev();
            if (next.length > 0) {
                liSelected = next.addClass('selected');
            } else {
                liSelected = li.last().addClass('selected');
            }
        } else {
            liSelected = li.last().addClass('selected');
        }

        if (liSelected) {
            $('body').animate({ scrollTop: liSelected.offset().top - 20 },
                              { duration: 500, queue: false });
        }

        return false;
    }

    if (e.which === 13) {
        // enter
        if (liSelected) {
            window.location = liSelected.find('a').attr('href');
            return false;
        }
    }

    if (liSelected) {
        liSelected.removeClass('selected');
        liSelected = undefined;
    }

    if (e.which === 27) {
        // esc
        $('body').animate({scrollTop: 0}, 500);
        return false;
    }

    $('#search').focus();
});