Zopees, I have a simple, stupid question. I have a page that has a variable in the URL example "localhost:9673/TreePage?story_id=199093459087" When I open the tree, which is generated with an sql method thru branches_expr, by clicking on the plus sign the story_id variable is not anymore accessible. Because the url of the + sign does not contain the story_id variable. I know, I still use the zope 1.3 but I didn't Have time yet to upgrade..... Code <!--#with "_.namespace(obj_id=0)"--> <!--#tree id=obj_id branches_expr="SiteStruct(param=obj_id)" nowrap=1 single=1 --> <!--#var name--> <!--#if story--> <!--#var story--> <!--#/if--> <!--#/tree--> <!--#/with--> And the sql method is <!--#if param--> select sid AS obj_id,descr AS name, isleave from structure where pid=<!--#sqlvar param type=string--> <!--#else--> select sid AS obj_id,descr AS name,isleave from structure WHERE pid=''<!--#/if--> The structure table is mysql> show columns from structure; +---------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+-------------+------+-----+---------+-------+ | sid | varchar(20) | | | | | | descr | varchar(30) | | | | | | pid | varchar(30) | | | | | | isleave | varchar(10) | YES | | NULL | | +---------+-------------+------+-----+---------+-------+ You can dump some values in the database with INSERT INTO structure VALUES ('1','Een','',''); INSERT INTO structure VALUES ('2','Twee','',''); INSERT INTO structure VALUES ('3','Drie','',''); INSERT INTO structure VALUES ('4','EenEen','1','Yes'); INSERT INTO structure VALUES ('5','EenTwee','1','Yes'); INSERT INTO structure VALUES ('6','TweeEen','2','Yes'); INSERT INTO structure VALUES ('7','TweeTwee','2','Yes'); INSERT INTO structure VALUES ('8','DrieEen','3','Yes'); INSERT INTO structure VALUES ('9','DrietWee','3','Yes');