$cgi->hidden(-name => 'a', -value => 'project_list') . "\n";
print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
if (defined $project_filter);
$cgi->hidden(-name => 'a', -value => 'project_list') . "\n";
print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
if (defined $project_filter);