//窗口显示才加载
                        var wrapTop = $(".digital").offset().top;
                        var istrue = true;
                        $(window).on("scroll",
                        function() {
                            var s = $(window).scrollTop();
                            if (s > wrapTop - 500 && istrue) {
                                $(".timer").each(count);
                                function count(a) {
                                    var b = $(this);
                                    a = $.extend({},
                                    a || {},
                                    b.data("countToOptions") || {});
                                    b.countTo(a)
                                };
                                istrue = false;
                            };
                        })
                        //设置计数
                        $.fn.countTo = function (options) {
                            options = options || {};
                            return $(this).each(function () {
                                //当前元素的选项
                                var settings = $.extend({}, $.fn.countTo.defaults, {
                                    from:            $(this).data('from'),
                                    to:              $(this).data('to'),
                                    speed:           $(this).data('speed'),
                                    refreshInterval: $(this).data('refresh-interval'),
                                    decimals:        $(this).data('decimals')
                                }, options);
                                //更新值
                                var loops = Math.ceil(settings.speed / settings.refreshInterval),
                                    increment = (settings.to - settings.from) / loops;
                                //更改应用和变量
                                var self = this,
                                $self = $(this),
                                loopCount = 0,
                                value = settings.from,
                                data = $self.data('countTo') || {};
                                $self.data('countTo', data);
                                //如果有间断，找到并清除
                                if (data.interval) {
                                    clearInterval(data.interval);
                                };
                                data.interval = setInterval(updateTimer, settings.refreshInterval);
                                //初始化起始值
                                render(value);
                                function updateTimer() {
                                    value += increment;
                                    loopCount++;
                                    render(value);
                                    if (typeof(settings.onUpdate) == 'function') {
                                        settings.onUpdate.call(self, value);
                                    }
                                    if (loopCount >= loops) {
                                        //移出间隔
                                        $self.removeData('countTo');
                                        clearInterval(data.interval);
                                        value = settings.to;
                                        if (typeof(settings.onComplete) == 'function') {
                                            settings.onComplete.call(self, value);
                                        }
                                    }
                                }
                                function render(value) {
                                    var formattedValue = settings.formatter.call(self, value, settings);
                                    $self.html(formattedValue);
                                }
                                });
                            };
                            $.fn.countTo.defaults={
                                from:0,               //数字开始的值
                                to:0,                 //数字结束的值
                                speed:1000,           //设置步长的时间
                                refreshInterval:100,  //隔间值
                                decimals:0,           //显示小位数
                                formatter: formatter, //渲染之前格式化
                                onUpdate:null,        //每次更新前的回调方法
                                onComplete:null       //完成更新的回调方法
                            };
                            function formatter(value, settings){
                                return value.toFixed(settings.decimals);
                            }
                            //自定义格式
                            $('#count-number').data('countToOptions',{
                                formmatter:function(value, options){
                                    return value.toFixed(options.decimals).replace(/\B(?=(?:\d{3})+(?!\d))/g, ',');
                                }
                            });
                            //定时器
                            $('.timer').each(count);
                            function count(options){
                                var $this=$(this);
                                options=$.extend({}, options||{}, $this.data('countToOptions')||{});
                                $this.countTo(options);
                            }