my $cookie = $CGI->cookie(
                                -name    => 'stflogin',
                                -value   => '',
                                -expires => '-1d');
my $other_cookie = $CGI->cookie(    
                                -name    => 'stfpassword',
                                -value   => '',
                                -expires => '-1d');

print $CGI->header(-cookie=>[$cookie,$other_cookie]);