function ctrlEmail( mail )
{
  var pattern = new Array();
  pattern["email"] = "^[-!#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+@[-!#$%&\'*+\\/0-9=?A-Z^_`a-z{|}~]+\.[-!#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+$";
  
  if( ! mail.match( pattern["email"] ) ) return false;

  var ind = mail.lastIndexOf( '.' );
  if(mail.length - ind != 3 && mail.length - ind != 4 && mail.length - ind != 5) return false;
  
  return true;
}