function CheckNewsletter()
{

  if ( window.document.forms[0].EMailAdr.value == "" )
    {
    alert( "Please insert your email address." );
    window.document.forms[0].EMailAdr.focus();
    return ;
    }

  window.document.forms[0].submit() ;

  alert( "Thank you for joining to the announcement mailing list!" ) ;

}