getting changed name of a file

Dear All,

I am generating a formatted file in an application for inporting data from Excel and CSV. Now the data is entered into formatted file and saved.

Presently I am not allowing the file name to be changed so that I am able to save it in a cookie which I am expiring after a few days( as a security feature).

But If I were to allow the user to change the file name and save it after entering the data how can get I get the new name of the file or the previous name of the file with the changed name.This will allow me to get some info from the previous name as well as have the security feature.

 

Thanks.
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