อยากสอบถามผู้รู้เกี่ยวกับ datetimepicker ครับ ผมงมนานมากกก

         var testEndDate = EndDateTextBox.datetimepicker('getDate');
         var testtEndDate = StuendDateTextBox.datetimepicker('getDate');
	        if (testEndDate > testtEndDate)
		EndDateTextBox.datetimepicker('setDate', testtEndDate);

	$(function(){

	var StartDateTextBox = $('#time_start');
	var EndDateTextBox = $('#time_end');
	var StustartDateTextBox = $('#time_stu_start');
	var StuendDateTextBox = $('#time_stu_end');

	StartDateTextBox.datepicker({ 
		dateFormat: 'dd-mm-yy',
		onClose: function(dateText, inst) {
			if (EndDateTextBox.val() != '') {
				var testStartDate = StartDateTextBox.datetimepicker('getDate');
				var testEndDate = EndDateTextBox.datetimepicker('getDate');
				if (testStartDate > testEndDate)
					EndDateTextBox.datetimepicker('setDate', testStartDate);
			}
			else {
				EndDateTextBox.val(dateText);
			}
		},
		onSelect: function (selectedDateTime){
			EndDateTextBox.datetimepicker('option', 'minDate', StartDateTextBox.datetimepicker('getDate') );
		}
	});
	EndDateTextBox.datepicker({ 
		dateFormat: 'dd-mm-yy',
		onClose: function(dateText, inst) {
			if (StartDateTextBox.val() != '') {
				var testStartDate = StartDateTextBox.datetimepicker('getDate');
				var testEndDate = EndDateTextBox.datetimepicker('getDate');
				if (testStartDate > testEndDate)
					StartDateTextBox.datetimepicker('setDate', testEndDate);
			}
			else {
				StartDateTextBox.val(dateText);
			}
		},
		onSelect: function (selectedDateTime){
			StartDateTextBox.datetimepicker('option', 'maxDate', EndDateTextBox.datetimepicker('getDate') );
		}
	});
	StustartDateTextBox.datepicker({ 
		dateFormat: 'dd-mm-yy',
		onClose: function(dateText, inst) {
			if (StuendDateTextBox.val() != '') {
				var testtStartDate = StustartDateTextBox.datetimepicker('getDate');
				var testtEndDate = StuendDateTextBox.datetimepicker('getDate');
				if (testtStartDate > testtEndDate)
					StuendDateTextBox.datetimepicker('setDate', testtStartDate);
			}
			else {
				StuendDateTextBox.val(dateText);
			}
		},
		onSelect: function (selectedDateTime){
			StuendDateTextBox.datetimepicker('option', 'minDate', StustartDateTextBox.datetimepicker('getDate') );
		}
	});
	StuendDateTextBox.datepicker({ 
		dateFormat: 'dd-mm-yy',
		onClose: function(dateText, inst) {
			if (StustartDateTextBox.val() != '') {
				var testtStartDate = StustartDateTextBox.datetimepicker('getDate');
				var testtEndDate = StuendDateTextBox.datetimepicker('getDate');
				if (testtStartDate > testtEndDate)
					StustartDateTextBox.datetimepicker('setDate', testtEndDate);
			}
			else {
				StustartDateTextBox.val(dateText);
			}
		},
		onSelect: function (selectedDateTime){
			StustartDateTextBox.datetimepicker('option', 'maxDate', StuendDateTextBox.datetimepicker('getDate') );
		}
	});
});