function checkRecaptcha(functionCaptcha, recaptcha_response_field, recaptcha_challenge_field ) {
  var parameter = 'recaptcha_response_field='+recaptcha_response_field+'&recaptcha_challenge_field='+recaptcha_challenge_field;
  $.get('/lanxess/emea/en/recaptcha/checkRecaptcha', parameter, functionCaptcha);
}