function refreshImage(idTeg, id) {
  $('#' + idTeg).attr("src", '/antispam.php?id=' + id + '&i = ' + Math.floor(Math.random()*100000));
}

function checkEmail(email) {
  if (/^(([a-z\d][a-z\d\-\_\.]*)?[a-z\d](\.([a-z\d][a-z\d\-\_]*)?[a-z\d])*)+@(([a-z\d][a-z\d\-\_]*)?[a-z\d](\.([a-z\d][a-z\d\-\_]*)?[a-z\d])*)$/i.test(email))
  return true; else return false;
}