Select Code to Download

<tr>
          <td align="right">Description of Checkbox</td>
...
</td>
          <td colspan="6"><b>No preference.</b></td>
        </tr>

my $foobar = param('foobar');
die "Invalid datatype for foobar" if $foobar =~ /[^0-9]/;
print "checked\n" if $foobar == 0;