<!--

function CheckEmail(Email) {
 filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
 return filter.test(Email); 
}


function check(NewsletterRegistration) {
 if (NewsletterRegistration.Email.value == '') {
  alert('Email field is empty. Until it is filled with the proper data, form submitting is unavailable.');
  return false;
 }
 else if (!CheckEmail(NewsletterRegistration.Email.value)) {
  alert('Email address format is incorrect.');
  return false;
 } 
 return true;
}


//-->