function tribo_trim( word ) {
	return word.replace(/^\s*/, '').replace(/\s*$/, '');
}

function tribo_email_valido(email) {
  var email_re = /^[A-Za-z0-9_&+.-]+@([A-Za-z0-9_-]+\.)+[A-Za-z]{2,4}$/;
  return email_re.test(email);
}