<!--//

function isEmailAddress (string) {
  var addressPattern = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
  return addressPattern.test(string);
}

function getkey(e){
  if (window.event)
    return window.event.keyCode;
  else if (e)
    return e.which;
  else
    return null;
}

function goodchars(e, goods){
  var key, keychar;
  key = getkey(e);
  if (key == null) return true;

  keychar = String.fromCharCode(key);
  keychar = keychar.toLowerCase();
  goods = goods.toLowerCase();

  if (goods.indexOf(keychar) != -1)  return true;
  if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 )  return true;
  return false;
}

//-->