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Article:
  Hierarchical Menus with the Underrated style.display Object
Subject:   improvements...
Date:   2004-01-01 08:33:46
From:   anonymous2
Response to: improvements...

the hideAll() function is used to allow users who have turned off JavaScript to use the page - if you hide the 'levels' using CSS, then a user with JavaScript turned off won't be able to see them at all.