/*****************
/validatie e-mail/
*****************/
function isMail(mail){
  if (mail == ""){ 
    return false;
  }
  if ((mail.indexOf('@', 0) == -1) || (mail.indexOf('.', 0) == -1)){
    return false;
  }	
  if ((mail.indexOf(' ', 0) != -1)){
    return false;
  }	
  return true;
}

/******************
/validatie nummers/
******************/
function isOK(nr,checkOK){
  var checkStr = nr;
  var allValid = true;
  var decPoints = 0;
  var allNum = "";
  for (ii = 0;  ii < checkStr.length;  ii++)
  {
    ch = checkStr.charAt(ii);
    for (jj = 0;  jj < checkOK.length;  jj++)
      if (ch == checkOK.charAt(jj))
        break;
    if (jj == checkOK.length)
    {
      allValid = false;
      break;
    }
  }
  if (!allValid)
  {
    return (false);
  }
  return (true);
}