I think you mean Content-type: text/html\n\n. Note that it has a hyphen. If you were to use the CGI module, you could simply use the header() method with no arguments:

use CGI ':standard';

print header();
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You'll find you have more luck parsing params with CGI.pm than trying to read from INPUT which probably isn't even open.

Is this a stripped down version of the script, or what you intend to use?
If the latter, then please: use CGI; use strict; use warnings; and call perl with the -T switch, be sure to Super Search the monastery and have a look at the Tutorials, not the least to check out is Ovids CGI-course.

Is the script executable? is the http-server configured to allow script-execution in the cgi-bin directory relative to the scripts location? What is in the file, if you save it? I'd bet the script itself...you have to check

regards,
tomte

Hlade's Law:

If you have a difficult task, give it to a lazy person --
they will find an easier way to do it.

You need to put a hyphen in the 'Content type' word(s) instead of a space. Also, you have a space at the end of the header. I doubt this is part of the problem, but possible. So print "Content type: text/html \n\n"; should say print "Content-type: text/html\n\n";. Oddly, mozilla processes "Content type: text/html \n\n" just fine.

If the above content is missing any vital points or you feel that any of the information is misleading, incorrect or irrelevant, please feel free to downvote the post. At the same time, please reply to this node or /msg me to inform me as to what is wrong with the post, so that I may update the node to the best of my ability.

Also, you will be better with '/cgi-bin' instead of './cgi-bin'

Do other scripts with the pl extension work correctly? If not, check the application settings under the web site in IIS manager. These can be found by right clicking on the default web site, choosing properties, then clicking configuration at the bottom of the "Home Directory" tab. You should find that .pl is listed under mappings with an executable line something like C:\Perl\bin\perl.exe "%s" %s and Verbs limited to GET,POST. If it is not there, just add it in. If it is check for execute permissions on the cgi-bin folder under IIS manager and the file system

Assumptions, that Windows/IIS Platform is being used and Perl.exe is located at c:\perl\bin\perl.exe since #!c:\perl\bin\perl

#!/usr/bin/perl

use warnings;
use strict;
use CGI qw( :standard );

our $query = new CGI;
our $method = $query->param("op");
print $query->header;
print $query->start_html(-title=>'Fon');
unless ($method) { 
       print $query->start_form(-method=>"POST");
       print $query->textfield(-name=>'fon');
       print $query->hidden(-name=>'op',
                            -default=>"01");
       print $query->submit('submit','submit');
       print $query->endform;
} else {
       my $fon = $query->param("fon");
       open (OUT, ">fon.txt");
       print OUT $fon, "\n";
       close OUT;
       print "Your fon has been entered";
}
print $query->end_html;
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