Funcion JS para loguear errores de Parsley

gistfile1.txt

$('form').parsley( {
    listeners: {
      onFieldError: function ( elem, constraints, ParsleyField ) {
        if (javascript_env == 'production') {
          return;
        }
        _log("Errores: ")
        _log(elem.attr("name") + ": " + elem.val());

        for(constraint_id in constraints) {
          if (constraints.hasOwnProperty(constraint_id)) {
            _log(constraint_id + ": " + constraints[constraint_id].requirements);
          }
        }
     }
  }
});