function _grant_user_case_permissions($nid, $uid)
{

	// Get the current nid level...
	$query = db_query("SELECT field_quiz_order_value AS current_level FROM {content_type_quiz} WHERE nid = %d ORDER BY vid DESC LIMIT 1", $nid);

	if ($query->num_rows > 0)
	{
		$row = db_fetch_array($query);
		$current_level = $row['current_level'];

		$query = db_query("SELECT field_quiz_order_value AS new_level FROM {content_type_quiz} WHERE field_quiz_order_value > %d ORDER BY field_quiz_order_value ASC, vid DESC", $current_level);

		if ($query->num_rows > 0)
		{
			$row = db_fetch_array($query);
			$next_level = $row['new_level'];

			// if there is a next level...
			if ($next_level > 0 && $next_level != $current_level)
			{
				// Get all the nid's associated with the next stepped level, grant permission.
				// Only give access to published quizes...

				$query = db_query("SELECT c.nid FROM {content_type_quiz} c
									INNER JOIN (SELECT     MAX(vid) AS vid, nid FROM content_type_quiz a GROUP BY nid ) x ON x.vid = c.vid AND x.nid = c.nid
    								INNER JOIN node n ON c.nid = n.nid
									WHERE     field_quiz_order_value <= %d AND
          									  n.status = %d
									ORDER BY  c.nid", $next_level, 1);
				while ($row = db_fetch_array($query))
				{
					// check exists
					$check = db_query("SELECT nid FROM {node_access} WHERE nid = %d AND gid = %d AND realm = '%s'", $row['nid'], $uid, 'nodeaccess_uid');
					if ($check->num_rows == 0)
					{
						// Grant access
						db_query("INSERT INTO {node_access} (nid,gid,realm,grant_view,grant_update,grant_delete) VALUES (%d,%d,'%s',%d,%d,%d)", $row['nid'], $uid, 'nodeaccess_uid', 1, 0, 0);
					}
				}

			}
		}
	}
}