Rails - Dec 2007 - getting drop-down selection on a "new" view to controller

On a "new" view, there''s two drop-down lists - Company and
Contact.
They both display the name, but store the id.  After changing the
company drop-down list, I want to limit the Contact drop-down list to
only Contacts for the selected Company.


I added a function call to the OnChange event of the company drop-down
list:
   {:onChange => remote_function(:url => { :action =>
''update_contact_list'', :company_id => quote.company_id }) }


And then I have this is the Controller:
  def update_contact_list
      @company = Company.find(params[:company_id])
      @contact_list = Contact.find(:all, :order => :first_name,
:conditions => [ "company_id =?", @company ])
      render :update do |page|
          page.replace_html ''contact_list'',
''collection_select :quote,
:contact_id, @contact_list, :id, :first_name, { :include_blank => true,
:multiple => false } , :html => { :id => "contact_list"
}''

      end
   end


It''s complaining that "quote" (in the
"quote.company_id" part of the
OnChange code in the view) is nil.  Which I suppose it is, since the
record hasn''t been saved yet.  What''s the best way to handle
that?  The
company drop-down is the first thing on the page (or in other words,
it''s the first field users are going to enter data into - so, saving
the
record before they get to that point isn''t a great option).  Is there
another way to pass the value they just selected to the controller?

Thanks!
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