my @hidden_variables = (qw(l_subtotal l_linetotal searchitems itemstatus bom), @itemstatus_keys, @callback_keys, map { "l_$_" } @columns);
my $callback = build_std_url('action=generate_report', grep { $form->{$_} } @hidden_variables);
my @hidden_variables = (qw(l_subtotal l_linetotal searchitems itemstatus bom), @itemstatus_keys, @callback_keys, map { "l_$_" } @columns);
my $callback = build_std_url('action=generate_report', grep { $form->{$_} } @hidden_variables);