求easyui 的tree 找不到ID

<script type="text/javascript">    
        $(document).ready(function () {
             mytree = $('#treeDemo').tree({
              AllowDrop: true,
                animate: true,
                dnd: true,
                enableDnd : true,
                checkbox: false,
                url: '/bm/GetListData',
                 onClick: function (node) {
                   
                        if (node.state == "closed")
                            ExpandNode(node);
                        else
                        { CollapseNode(node); }
                } ,
                onContextMenu: function (e, node) {
                    e.preventDefault();
                    $(this).tree('select', node.target);
                    $('#mm').menu('show', {
                        left: e.pageX,
                        top: e.pageY
                    });
                }
            });

        });

用自带的属性方法mytree.tree("getSelected") 得不到数据
mytree.tree("getSelected").id 总是为空
[解决办法]
easyui-1.2.1
easyui-1.3.4

2个版本测试了都没问题