I don't understand what you try to tell me

I believe iam asking if the submitted user selection from the drop down list contains the null string....and if yes iam printing a custom error message.

That can happen because sometimes people instead of making a selection from the drop down menu they pass values to variable $select from the url like this: http://nikos.no-ip.org/cgi-bin/index.pl?select=../somefilename.ext or attach a null string to attempt to hack the page.

In reply to Re^2: somethign wrong with the sumbit by Nik
in thread somethign wrong with the sumbit by Nik

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