[Zope] How to get hands on url with hash?

["Jürgen R. Plasser"]

Is it possible (or even intended, did'nt read any RFCs regarding this) 
to retreive any url like http://www.example.com/index_html#hash (<- 
note: hash!)  from the request?

I need this for a login-redirect, the user clicks on a link like the one 
above and zope needs authentication (done by CookieCrumbler). I store 
the referrer in field called came_from where I can redirect 
(CookieCrumbler does this) the browser to after login.

What do you think?

Jürgen