flagsrequired => { editcatalogue => '*' },
}
);
my $is_valid = is_valid_checksum($issn);
my $is_valid = 0;
if ($issn =~ /^\d{4}-\d{3}[\dXx]$/) {
$is_valid = is_valid_checksum($issn);
if ($issn eq '') {
$is_valid = 1;
$template->param( return => $is_valid );
output_html_with_http_headers $cgi, $cookie, $template->output;
};
-