#!/usr/bin/env ruby

require 'mechanize'

LOGIN  = ''
PASS = ''

agent = Mechanize.new
agent.get('https://www.linux.org.ru/login.jsp') do |page|

    form = page.form_with(:action => 'https://www.linux.org.ru//login_process') do |f|
        f.nick = LOGIN
        f.passwd = PASS
    end.click_button
end