var interval2 = 30000;
function updateOnline() {
	var ajax = InitAjax();
	var url = "config/sendData.php?op=userOnlineInfo&currenttime=" + getCurrentTime();
	ajax.open("GET", url, true);
	ajax.onreadystatechange = function(){
		if (ajax.readyState==4 && ajax.status==200) {
			var msg = ajax.responseText;
			var obj;
			if (obj = document.getElementById("onlineInfo")) {
				obj.innerHTML = msg;
			}
		}
	}
	ajax.send(null);
}
updateOnline();
setInterval("updateOnline()", interval2);