$form->{callback} ||= build_std_url("action=show_invoices", qw(customer invnumber ordnumber groupinvoices minamount dunning_level notes));
$form->{PRINT_OPTIONS} = print_options('inline' => 1,
$form->{callback} ||= build_std_url("action=show_invoices", qw(customer invnumber ordnumber groupinvoices minamount dunning_level notes));
$form->{PRINT_OPTIONS} = print_options('inline' => 1,