Thank you for your response.

I finaly found a workaround using some javascript :

<script>document.write("<form 
action='prod.h'+'tml'>");</script>

It works...

If I may suggest you something about this topic :
it would be usefull to have the possibility to simply 
update the form action URL to a local page and save 
this page as it is, without any data in the form input 
value, so
in the form, 'prod.asp' will be updated as 'prod.html'
and prod.asp will be called and saved as prod.html.
This functionality is usefull when mirroring a 
website, taking into account that this website should 
manage the case.

Regards.

Pierre JOURDE.