OK If you have been watching the PHP-General list you will have seen
that I've cracked the problem. Basically I just needed to update the
session variables BEFORE waiting for Firebird. And then put the right
values in after Firebird returned them.

Don't need to worry about Javascript or anything 'extra' in browser end,
and double click is now ignored.

I had not appreciated that the second request from the same browser was
not queued, since there is only ONE page output back to the browser
after processing, so I assumed things were being handled and then the
result generated.

--
Lester Caine - G8HFL
-----------------------------
L.S.Caine Electronic Services - http://home.lsces.co.uk
Model Engineers Digital Workshop -
http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/
Treasurer - Firebird Foundation Inc. - http://www.firebirdsql.org/index.php