//官方推荐this.getModuleGrid().getRootNode().cascadeBy(function () {            this.set("checked", false);            if (ids.indexOf(this.data["Id"].toString()) > -1) {                this.set("checked", true);            }        });//通过Children方式GetChilds: function (idArray, node) {        ts = this;        childnodes = node.childNodes;        Ext.each(childnodes, function () {            var nd = this;            idArray.push(nd.getId());            if (nd.hasChildNodes()) {                ts.GetChilds(idArray, nd);            }        });    }//根据ID获取Nodevar node=treepanel.getNodeById(node_id);    // treepanel.expandPath(node.getPath())    treepanel.getSelectionModel().select(node)