Dear ALL,

I'm programming a web site that has a small shopping cart to sell virtual
information, I must allocate the information I'm selling (Phone Card PIN
Codes) and block it from others, once a user adds it to his cart, and on the
other hand, I must set it free (DeAllocate it) when the user leaves the site
without checking out. I'm using session to figure out the users, but I donno
how to sense when the user has left the site, and his session is closed

Any Body Can Help??????
Thanx in Advanced
bst rgds

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