// HTML
// only month and year
  <input name="month" id="datMonthYearFrom" />
// All
  <input name="month1" id="datMonthYearTo" />
// JS
$(function () {
     $("#datMonthYearFrom").datepicker({
                        changeMonth: true,
                        changeYear: true,
                        showButtonPanel: true,
                        dateFormat: "MM yy",
                        onClose: function (dateText, inst) {
                            $(this).datepicker('setDate',
new Date(inst.selectedYear, inst.selectedMonth,
1));
                        }
                    }).focus(function () {
                        var thisCalendar = $(this);
                        $('.ui-datepicker-calendar').detach();
                    });           
////////////////////////////////////////// Second
$("#datMonthYearTo").datepicker({
                        changeMonth: true,
                        changeYear: true,
                        showButtonPanel: true,
                        dateFormat: "MM yy",
                        onClose: function
(dateText, inst) {
                            $(this).datepicker('setDate',
new Date(inst.selectedYear, inst.selectedMonth,
1));
                        }
                    });
});