var curr_id = -99999;
function checkCalendar() {
	subject_id = "div_calendar";
	if (document.getElementById("latest_id") != null) {
		curr_id = document.getElementById("latest_id").innerHTML;
	}
	if (document.getElementById("st_id") != null) {
		document.getElementById("st_id").innerHTML = stay_time;
	}
	http.open("GET", "/ajax/reform_calendar_new.php?lg="+UserEncoding+"&id="+escape(curr_id)+"&rn="+escape(stay_time), true);
	http.onreadystatechange = handleHttpResponse;
	http.send(null);
	setTimeout("checkCalendar()", 20000);
}