title: drupal display submenu when parent has been selected
body: <p>I've have a menu structure that has a depth of 3 levels on a drupal 6 CMS.  </p>
  
  <p>When I click on a level 1 that has children, the level 2 menu items display fine.  If the level 2 has children, it is not showing the level 3.</p>
  
  <p>If I check the expanded box the level 3 is displayed however, it displays all the time irrespective of the level 2 that has been selected.  It seems to display whenever it's parent level 1 is selected.</p>
  
  <p>For further information, the menu items are a mixture of custom links &amp; content links.  i.e. Links I've enetered manually when creating the menu and others generated by when creating a node or view display.</p>
  
  <p>All I want is to show the children if there are any for the selected parent.</p>
  
  <p>Am I missing something fundamental here?  </p>
  
  <p>Thanks
  Steve</p>