function list_calendar(act, y, m, d){
		var req = new Subsys_JsHttpRequest_Js();
		req.onreadystatechange = function() {
			if (req.readyState == 4) {
				var div = document.getElementById("calendar");
				div.innerHTML = req.responseJS.content; 
			}
		} 
		req.caching = false;
		file = 'http://vi.russia.edu.ru/news/calendar/news_calendar.php';
		req.open('GET', file, true);
		req.send({ act: act, y: y, m: m, d: d });
}