var xhr;
function ClientReply(){
	try {
	xhr = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
	try {
	xhr = new ActiveXObject("Microsoft.XMLHTTP");
	} catch (E) {
	xhr = false;
	}
	}
	if (!xhr && typeof XMLHttpRequest != "undefined") {
	xhr = new XMLHttpRequest();
	}
	xhr.open("GET", "check_online_users.php?reply=1");
	//xhr.onreadystatechange=function() {
	//if (xhr.readyState != 4) return;
	//else{
	//	alert(xhr.responseText);
	//}
	//}
	xhr.send(null);
}