// // 环形轮播图



    $('.poster-list li').bind({
        reposition: function() {
            var degrees = $(this).data('roundabout').degrees,
                roundaboutbearing = $(this).parent().data('roundabout').bearing,
                rotatey = math.sin((roundaboutbearing - degrees) * (math.pi/180)) * 9;

            $(this).css({
                "-webkit-transform": 'rotate(' + rotatey + 'deg)',
                "-moz-transform": 'rotate(' + rotatey + 'deg)',
                "-ms-transform": 'rotate(' + rotatey + 'deg)',
                "-o-transform": 'rotate(' + rotatey + 'deg)',
                "transform": 'rotate(' + rotatey + 'deg)'
            });
        }
    });

    $('.jq_sliderprev').on('click', function(){
        $('.poster-list').roundabout('animatetonextchild');

        return false;
    });

    $('.jq_slidernext').on('click', function(){
        $('.poster-list').roundabout('animatetopreviouschild');

        return false;
    });

    $('body').on('keyup', function(e) {
        var keycode = e.which || e.keycode;

        if(keycode == 37) {
            $('.poster-list').roundabout('animatetopreviouschild');
            e.preventdefault();
            return false;
        } else if(keycode == 39) {
            $('.poster-list').roundabout('animatetonextchild');
            e.preventdefault();
            return false;
        }
    });

    $('.jq_sliderswitch li').on('click', function() {
        var $elem = $(this);
        var index = $elem.index();

        $('.poster-list').roundabout('animatetochild', index);

        return false;
    });

    $('.poster-list').roundabout({
        minscale: 0.4,
        maxscale: 0.9,
        duration: 750,
        autoplay: true,
        autoplayduration: 3000
    }).bind({
        animationend: function(e) {
            var index = $('.poster-list').roundabout('getchildinfocus');
            $('.jq_sliderswitch li').removeclass('active');
            $('.jq_sliderswitch li').eq(index).addclass('active');
        }
    });