"destroy");
            $('#using_json').jstree({
                "plugins" : [ "types","search"],
                //'plugins' : ["checkbox"], //出现选择框
                //'checkbox': { cascade: "", three_state: true }, //不级联
                'core' : {
                    "check_callback": true,
                    'data' :  function (obj, callback){
                        $.ajax({
                            type : "post",
                            url : server_context+"/wemock_jstree_node?