Redirecting the user to the previous page using CGI.pm should be failry straightforward. Here's some sample code that should give you an idea on how to go about this.

#!/usr/bin/perl

    use strict;

    use CGI;
    my $query = CGI->new();

    # code to enter records into database goes here.

    my $referrer = $ENV{HTTP_REFERER};

    print $query->redirect($referrer);
[download]

Hope this helps.

- wil