function send_data( selection,language ) {
  var email = document.newsletter.email.value;
  pattern = new RegExp( '^([a-zA-Z0-9\\-\\.\\_]+)(\\@)([a-zA-Z0-9\\-\\.]+)([\\.])([a-zA-Z]{2,4})$' );
     if ( !pattern.test(email) ) {
        if (language=="pl")
           alert("Nieprawidłowy format adresu e-mail !");
		else
           alert("Invalid e-mail address !");
	 document.newsletter.email.focus();
	 return false; }	
  
  document.newsletter.type.value = selection;
  document.newsletter.submit();
}