js 比较日期大小

 //1获取当前时间

            var curTime = new Date();



            //2把字符串格式转换为日期类

            var startTime = new Date(Date.parse(kc.begintime));

            var endTime = new Date(Date.parse(kc.endtime));



            //3进行比较

            return (curTime>=startTime && curTime<=endTime);