var myDate = new Date();

        /*获取一个月的天数 */
        function getCountDays() {
            var curDate = new Date();
            var curMonth = curDate.getMonth();
            curDate.setMonth(curMonth + 1);
            curDate.setDate(0);
            return curDate.getDate();
        }
       
        function getEveryDay() {
            var dayArry = [];
            var day = getCountDays();
            for (var k = 1; k <= day; k++) {
                dayArry.push(k);
            }
            
            return dayArry;
        };
       getEveryDay();