About persistent connections...

Hi to all !

Does anyone know how the postmaster handles persistent connections ?
I use to use them with php, but yet I haven't upgraded to postgreSQL 7.2, I'm 
still on version 7.1.3, and it occured to me that when my users close their 
browser rather than click on the quit button I provided, their connection 
remains alive and is never closed. Is there a way to set it up so that such 
connections are closed after a certain amount of time of inactivity, as it is 
done with ftp for example ? Thanks by advance for your help.
-- 
David BOURIAUD
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In a world without walls or fences, what use do we have 
for windows or gates ?
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ICQ#102562021