my $tempport;                      # declare var
if(  $args{DOUBLE_BYTE} =~ /y/i )  # try to match with a regex
                                   # regex is just looking for 'y'
                                   # the /i means case-insensitive
{
  $tempport = DB_CATPORT;         # Set to DB_CATPORT
}
else
{
  $tempport = SB_CATPORT;         # Set to SB_CATPORT
}