my $cook= HTTP::Cookies::Netscape->new(file => 'ciao.txt' ,ignore_disc
+ard => 1,autosave=>1);

$m = new WWW::Scripter(autocheck=>1,cookie_jar=>$cook) ;
[download]

How can I enable?

Ha ha, this is faq, see LWP::Debug

FWIW, this works for me

#!/usr/bin/perl --
use strict;
use warnings;

use WWW::Scripter;
my $w = WWW::Scripter->new;
$w->use_plugin('JavaScript');

#~ http://w3schools.com/jsref/prop_doc_cookie.asp# HTML DOM Document c
+ookie Property
#~ http://w3schools.com/jsref/tryit.asp?filename=tryjsref_doc_cookie
#~ http://w3schools.com/jsref/tryit_view.asp?filename=tryjsref_doc_coo
+kie

$w->get('http://w3schools.com/jsref/tryit_view.asp?filename=tryjsref_d
+oc_cookie');
print $w->cookie_jar->as_string, "\n\n";
print $w->document->body->as_text;
__END__

Set-Cookie3: ASPSESSIONIDACRSCCCQ=FAKEASPSESSIONIDACRSCCCQ; path="/"; 
+domain=w3schools.com; path_spec; discard; version=0



Cookies associated with this document:
ASPSESSIONIDACRSCCCQ=FAKEASPSESSIONIDACRSCCCQ
[download]

But the cookie you talk about, it is not write with JavaScript, but with ASP:
ASPSESSION

I have not any difficult to read cookies, but I have difficult to write cookie in JavaScript.
The cookies are not been writed.