building a navigation with nested sets, from the selected node up

Question

Hi,

I have the following tree structure using nested sets with lft & rgt values.

node
    node
        node
    node
        node (selected)
        node
node
node
    node

I'd like to build a navigation so that the tree is expanded, only to the path of the selected node, and non relevant nodes are collapsed/hidden.

Using the above method, the tree would be outputted as follows:

node
    node
    node
        node (selected)
        node
node
node

is this possible using php/mysql? If any sql gurus can help build a query I'd be most appreciative.?

I don't mind if I need an extra query per level, its probably only going to be 4 or 5 levels deep at most...

Overview of the nodes table:

--
-- Table structure for table `exp_node_tree_1`
--

CREATE TABLE `exp_node_tree_1` (
  `node_id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
  `lft` mediumint(8) unsigned DEFAULT NULL,
  `rgt` mediumint(8) unsigned DEFAULT NULL,
  `moved` tinyint(1) NOT NULL,
  `label` varchar(255) DEFAULT NULL,
  `entry_id` int(10) DEFAULT NULL,
  `template_path` varchar(255) DEFAULT NULL,
  `custom_url` varchar(250) DEFAULT NULL,
  `extra` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`node_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=18 ;

--
-- Dumping data for table `exp_node_tree_1`
--

INSERT INTO `exp_node_tree_1` VALUES(1, 1, 12, 0, 'Home', 1, '0', '/', '');
INSERT INTO `exp_node_tree_1` VALUES(5, 10, 11, 0, 'About Us', 2, '4', '', '');
INSERT INTO `exp_node_tree_1` VALUES(6, 6, 9, 0, 'Team', 3, '5', '', '');
INSERT INTO `exp_node_tree_1` VALUES(7, 3, 4, 0, 'Contact Us', 4, '4', '', '');
INSERT INTO `exp_node_tree_1` VALUES(8, 7, 8, 0, 'Awards', 5, '5', '', '');
INSERT INTO `exp_node_tree_1` VALUES(10, 2, 5, 0, 'New Page', 6, '4', '', '');

Thank you!