function Subscribe() {
	var email = document.getElementById('txtEmail').value;
	var link  = "/newsletter/newsletter.php?email=" + email + "&subscribe=1";
	
	if (email.length > 0) {
		document.getElementById('newsletter_frame').src = link;
	}
}

function Unsubscribe() {
	var email = document.getElementById('txtEmail').value;
	var link  = "/newsletter/newsletter.php?email=" + email + "&subscribe=0";	
	
	if (email.length) {
		document.getElementById('newsletter_frame').src = link;
	}
}