[FX.php List] preventing refresh from rePOSTing?

[Joel Shapiro]

Hi all

I've got a real small project in which a user fills out a web form,  
and as long as all required fields contain data, a new record gets  
created on submit.

I've got the processing and the form on the same php page.

Can anyone suggest a quick/easy way to prevent the user from  
rePOSTing -- and thus adding an additional (duplicate) record -- by  
refreshing the page after submission?  The page *does* need to allow  
a user to submit additional records after the first submission, but I  
don't want a simple refresh to create a new record.

I can think of some ways to do this but don't want to re-invent the  
wheel if there's some standard way to do this already.

TIA,
-Joel