my $config = {
      INCLUDE_PATH => '/tt', 
      INTERPOLATE  => 1, 
      POST_CHOMP   => 1, 
      PRE_PROCESS  => 'header',
      EVAL_PERL    => 1,
};
my $tt = Template->new($config);

##</code><code>##

sub main_page {
  
  my $output = '';
  my $template = 'main.tt';
  my $vars = { title =>'AJAX Login'};
  $tt->process($template, $vars, \$output)
       || die $tt->error();
  return $output;
}