[Zope] referencing object with variable

[mindlace]

Zopistas,

This renders the DTML Document named by the cookie variable id:
<dtml-var "_[REQUEST.cookies['id']]">

However, this gives me an error:

<dtml-call "_[REQUEST.cookies['id']].manage_changeProperties(REQUEST)">

The error is:

Error Type: AttributeError
Error Value: 'string' object has no attribute 'manage_changeProperties'

Traceback (innermost last):
  File /imeme/zope/lib/python/ZPublisher/Publish.py, line 214, in
publish_module
  File /imeme/zope/lib/python/ZPublisher/Publish.py, line 179, in
publish
  File /imeme/zope/lib/python/Zope/__init__.py, line 202, in
zpublisher_exception_hook
    (Object: ElementWithAttributes)
  File /imeme/zope/lib/python/ZPublisher/Publish.py, line 165, in
publish
  File /imeme/zope/lib/python/ZPublisher/mapply.py, line 160, in mapply
    (Object: thankyou)
  File /imeme/zope/lib/python/ZPublisher/Publish.py, line 102, in
call_object
    (Object: thankyou)
  File /imeme/zope/lib/python/OFS/DTMLMethod.py, line 145, in __call__
    (Object: thankyou)
  File /imeme/zope/lib/python/DocumentTemplate/DT_String.py, line 502,
in __call__
    (Object: thankyou)
  File /imeme/zope/lib/python/DocumentTemplate/DT_Util.py, line 335, in
eval
    (Object: _[REQUEST.cookies['id']].manage_changeProperties(REQUEST))
    (Info: REQUEST)
  File &lt;string&gt;, line 0, in ?
  File /imeme/zope/lib/python/DocumentTemplate/DT_Util.py, line 127, in
careful_getattr
AttributeError: (see above)

I _know_ that id is a string value.  I don't want id, I want the
document *named* by ID.  I can see no other way to do what I'm trying to
do.

Thanks eternally for assistance,
-- 
ethan mindlace fremen        mindlace@imeme.net
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