EasyUI Combobox 设置默认值

<input required="true" missingMessage="不能为空" id="tableYear" class="easyui-combobox" 
					name="tableYear"
					data-options="
					url:'/common/selectYear',
					onLoadSuccess : function() {
                                                $('#tableYear').combobox('select', '2021');
						$('#tableYear').combobox('setValue', 6);
					},
					method:'get',
					valueField:'id',
					textField:'text',
					panelHeight:'300'
					">

该下拉值为每年的年份，