问Javascript时间轴问题

EN

$('a.next').click(function () { selector.children('.dates-bar').children('a.next').click(function(){
                var actual_scroll = scroll_count;
                var c = selector.children('.dates-bar').children('a:not(.prev, .next, .noevent):visible()').length
                if(scrolled + scroll_count >= c)
                    actual_scroll = (c - scrolled)-1

                if(parseInt(selector.children('.dates-bar').children('a:not(.prev, .next, .noevent):visible():eq(0)').css('width'))*actual_scroll > selector.children('.dates-bar').width())
                    while(parseInt(selector.children('.dates-bar').children('a:not(.prev, .next, .noevent):visible():eq(0)').css('width'))*actual_scroll > selector.children('.dates-bar').width() && actual_scroll > 1)
                        actual_scroll -= 1;

                var a = (-1)*actual_scroll*parseInt(selector.children('.dates-bar').children('a:not(.prev, .next, .noevent):visible():eq(0)').css('width'));
                selector.children('.dates-bar').children('a:not(.prev, .next, .noevent):visible():eq(0)').animate({marginLeft: '+=' + String(a)+ 'px'}, scroll_time)
                scrolled += actual_scroll;

                current_month = new Date(selector.children('.dates-bar').children('a:not(.prev, .next, .noevent):visible():eq(' + String(scrolled) + ')').attr('data-date')).getMonth()

                selector.children('.month-year-bar').children('.month').children('span').text(month[current_month])
            }) });