How to specify cache time out period for images !!!!

[Puthezhath, Rajeev (TWII Boston)]

Hi,

We have a J2EE application developed with JSP,EJB and SQL server 2000 with
Orion Server.We want to cache all our jsp page  for a particular time on a
caching server.With HTTP Headers this is perfectly working but the  images
on the page it never Time out. I would like to know if there is a way to set
cache time out for images in Orion or JSP

Can any body help.

Regards

Rajeev