function get_user_language() {
  if (navigator.userLanguage == 'string') return(navigator.userLanguage);
  else if (navigator.language == 'string') return(navigator.language);
  else return('(Not supported)');
};

function get_system_language() {
  if (navigator.systemLanguage == 'string') return(navigator.systemLanguage);
  else if (navigator.language == 'string') return(navigator.language);
  else return('(Not supported)');
};

function get_plugins() {
  //plugins = navigator.plugins;
  return 'to_be_done';
};

function screen_width() {
  if (window.screen) return(screen.width);
  else return(0);
};

function screen_height() {
  if (window.screen) return(screen.height);
  else return(0);
};

function fill_user_info() {
  var user_info = '';
  user_info += 'appCodeName='+navigator.appCodeName+'\n';
  user_info += 'appName='+navigator.appName+'\n';
  user_info += 'appVersion='+navigator.appVersion+'\n';
  user_info += 'userLanguage='+get_user_language()+'\n';
  user_info += 'systemLanguage='+get_system_language()+'\n';
  user_info += 'platform='+navigator.platform+'\n';
  user_info += 'userAgent='+navigator.userAgent+'\n';
  user_info += 'javaEnabled='+navigator.javaEnabled()+'\n';
  user_info += 'taintEnabled='+navigator.taintEnabled()+'\n';
  user_info += 'cookieEnabled='+navigator.cookieEnabled+'\n';
  user_info += 'scrWidth='+screen_width()+'\n';
  user_info += 'scrHeight='+screen_height()+'\n';
  user_info += 'product='+navigator.product+'\n';
  user_info += 'productSub='+navigator.productSub+'\n';
  user_info += 'vendor='+navigator.vendor+'\n';
  user_info += 'vendorSub='+navigator.vendorSub+'\n';
  user_info += 'plugins='+get_plugins()+'\n';

  document.getElementById('user_info').value = user_info;
};

function hash_password_and_submit(login, pswd) {
  pswd.value = hex_md5(pswd.value);

  if (document.getElementById('login_remember') && document.getElementById('login_remember').checked) {
    Cookies.set('-login', login.value + '|||' + pswd.value, 1);
  };

  document.getElementById('login_form').submit();
};