var req = new Subsys_JsHttpRequest_Js();
var action = "show";
req.onreadystatechange = function() {
	if (req.readyState == 4) {
		document.getElementById('usertop').innerHTML = req.responseText;
	}
}
req.caching = false;
req.open('POST', '/ajax/usertop.php', true);
req.send({ act: action });