var nl_requester = getHTTPObject();

function nl_processReqChange(){
    if (nl_requester.readyState == 4) {
        if (nl_requester.status == 200) {
	        alert('A hírlevélre sikeresen feliratkoztán ezzel az e-mail címmel: ' + getElement('nl_email').value + '.');
			getElement('nl_email').value = '';
        }
    }
}

function nl_newsletterSignIn(){
    address = getElement('nl_email').value;
	if ( !validEmail( address ) ){
	    alert('Ez az e-mail cím nem érvényes!');
		return false;
	}
	
	nl_requester.onreadystatechange = nl_processReqChange;
	nl_requester.open('GET', 'ajax/newsletter_signin.php?email=' + escape(address), true);
	nl_requester.send( null );
	
	return true;
}