[ваый]

А так?

var req = getXmlHttp();
var statusElem = document.getElementById('content');

req.onreadystatechange = function() {
    if (req.readyState == 4) {
        statusElem.innerHTML = req.statusText; // показать статус (Not Found, ОК..)
        if(req.status == 200) {
            statusElem.innerHTML = "Ответ сервера: "+req.responseText;
        }
    }
}

*!*req.open('POST', '/1.php', true);*/!*
*!*req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");*/!*

var qw = 'qw=123123';
req.send(qw);