easyui combobox默认选中项

<script type="text/javascript">
         $("#areaCombobox").combobox({
                                  url: "${pageContext.request.contextPath}/areaAction_findAllArea.action", //获取后台动作方法返回的json数据
                                  valueField: 'id',
                                  textField: 'name',
                                  panelHeight: "auto",
                                  editable: false, //不允许手动输入
                                  onLoadSuccess: function () { //数据加载完毕事件
                                      var data = $('#areaCombobox').combobox('getData');
 
             　　　　　　　　  if (data.length > 0) {
                                        　　　　　　　　  $("#areaCombobox").combobox('select', data[0].name);
                                    　　　　　　　　  }
                                 　　　　　　　　 }
                             　　　　　　　　 });
 </script>