function vote() {
	var req = getXmlHttp()
	req.open('GET', '/ajax_intro/vote.php', true); 
	req.onreadystatechange = function() {
		if (req.readyState == 4) {
			document.getElementById('vote_status').innerHTML = req.statusText
			if(req.status == 200) {
			   alert("Ответ сервера: "+req.responseText);
			}
		}
    }
  

	req.send(null); 
	document.getElementById('vote_status').innerHTML = 'Ожидаю ответа сервера...'
}