WOW!!! It would appear you don't know How to RTFM, so I suggest you visit Tutorials and read the tutorial that teaches you how.

`perldoc WWW::Mechanize':

...
Constructor and startup
  new()

    Creates and returns a new WWW::Mechanize object, hereafter referre
+d to
    as the 'agent'.

        my $mech = WWW::Mechanize->new()

    The constructor for WWW::Mechanize overrides two of the parms to t
+he
    LWP::UserAgent constructor:

        agent => "WWW-Mechanize/#.##"
        cookie_jar => {}    # an empty, memory-only HTTP::Cookies obje
+ct
...
[download]

update: Apparently, your problem is you don't understand English very well. You should try getting a translator.

use WWW::Mechanize;
my $mechanize_with_a_memory_only_cookie_jar = WWW::Mechanize->new ( co
+okie_jar => {} );
[download]

update: By the way, that's the same as writing my $mechanize_with_a_memory_only_cookie_jar = WWW::Mechanize->new(); (that's the default).