var ajax;
function subscribe () {
	var name = document.getElementById('subscribe_name').value;
	var email = document.getElementById('subscribe_email').value;
	if (name == '') {
		alert ('Please, enter your name!')
		return;
	}
	if (email == '') {
		alert ('Please, enter your e-mail address!')
		return;
	}
	var filter=/^(\w+(?:\.\w+)*)@((?:\w+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	if (!filter.test (email)) {
		alert ('The e-mail address you provided is invalid!');
		return;
	}
	var subscribe = true;
	if (document.getElementById('subscribe').checked)
		subscribe = 'true';
	else
		subscribe = 'false';
	if(window.XMLHttpRequest)
		ajax = new XMLHttpRequest();
  	else
    	if (window.ActiveXObject)
	    	try {
	        	ajax = new ActiveXObject("Msxml2.XMLHTTP");
	        } catch (e) {
	        	try {
					ajax = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {}
			}
	ajax.onreadystatechange = receive;
	ajax.open("POST", "subscribe.php", true);
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send('name=' + encodeURI(name) + '&email=' + encodeURI(email) + '&act=' + subscribe);
}

function receive () {
	if (ajax.readyState == 4)
		alert (ajax.responseText);
}