[bruder]

хедеры не забываем послать

Код:

var req = (window.XMLHttpRequest)?new XMLHttpRequest():new ActiveXObject("Microsoft.XMLHTTP");
		param='hallo=myPOST';
		req.open("POST", "my.php"+'?'+Math.random(), true);
		req.onreadystatechange = function () {
			if (req.readyState == 4) {
				var txt = req.responseText;
				alert(txt);
			}
		};
		req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		req.setRequestHeader("Content-length", param.length);
		req.setRequestHeader("Connection", "close");
		req.send(param);

на my.php лови переменные из param