function doCalendar(month, year){
	var url = 'ajax_calendar.php?month='+month+'&year='+year;
	try{
		request = createXMLHttp();
		request.onreadystatechange = calendarChange;
		request.open("GET", url, true);  
		request.send(null);  
	}catch (e){}
}
function calendarChange(){  
	if ( request.readyState == 4 ){  
		if ( request.status == 200 ){  
			document.getElementById("cCalendar").innerHTML = request.responseText;
		}  
	}  
}