https://bugzilla.mozilla.org/show_bug.cgi?id=197603
197603 - cdfreaks.com - DHTML menus use document.layers/document.all
RESOLVED (english-us) in Tech Evangelism Graveyard - English US. Last updated 2015-04-19.
dhtml menususedocumentlayers
https://www.phpclasses.org/browse/file/10499.html
MenuNode.php - Accessible nested DHTML menus - PHP Classes
Base node class used to build menu structure. MenuNode.php This class can be used to generate HTML hierarchic menus that can be dynamically expanded and...
dhtml menusphpaccessiblenestedclasses