Page number in "beeldmerk"

[Geert Dobbels <geert@jet.es>]

My problem probably is due to beginner's ignorance.....

I need to create a document that has a predefined header on the top of
each page.  The header is a square with the width of the textblock.
Within that square are 2 company logos and 2 vertical lines.  The
pagenumber has to go in the right bottom side of this square and has a
format like in "page xx of yyy".

Since the normal positioning of pagenumbers in Context does not place
this pagenumber exactly where I need it, I decided to create the whole
header as described above within a "beeldmerk" (don't know the english
name of this command).  (to give a better idea of what I want, imagine
the logo on page 63 of the dutch context handleiding, appearing on every
page but with the pagenumber on the position where the pragma email
address appears in the book's example)

As I feared, the "beeldmerk" is generated and positioned correctly,
except for the pagenumber.  This number is in the correct position, is
correct on page 1 and on page 2, but stays 2 on all the pages that come
after page 2.

Any suggestion on how to avoid that ?