use HTTP::Request::Common qw(POST);
use LWP::UserAgent;
use strict;

my $ua = LWP::UserAgent->new();
my $req = POST 'http://home.sff.net/login.asp', [ username => 'jonathanmark', RecordID => 4142];
print "The netloc is" , $req->url->netloc, ". ";
$ua->credentials($req->url->netloc, "home.sff.net", 'jonathanmark', 'nottherealpassword');
my$content = $ua->request($req)->as_string;
print "Content is $content";