How do you prevent file upload duplicates?

Portal 3.0.9
SunOS 5.8
All,
Has anyone implemented a file upload portal that checks
to make sure the same file has not already been uploaded.
I currently have set up a portlet that allows a user to
upload files to a database table, but now I would like to
make sure the user is not sending duplicate files to the
table. I'm thinking of using JavaScript to capture the
filename and store it in the table and checking for
duplicates. Maybe, even setting up the file name column
as an index. All thoughts are welcome...
-Dan

Not in iWeb itself.
You have to edit the *published pages* with a HTML editor of your choice
http://www.pure-mac.com/webed.html

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