[Zope] Recursive method

[Roché Compaan]

I want to use a recursive method do draw the navigation tree for my site.  I
do not want to use the tree tag to iterate through the subfolders because
the question-mark in the tree-query might obscure pages of the site to
search engines.  How can one call a method from within a method passing
variables to that method?  How does one define a method which accepts
certain parameters eg.

if someone can translate this in to dtml for me this would be a great help:

recursive-dmtl-method(variable folder)
  in folder
    if document then
       makeHREF to document

  if folder.hassubfolders then
     recursive-dtml-method(folder)
--------------------------------------

This would be of great help.

Roché