var xmlHttp

function showCalendar(site_id, year, month)
{
	var url

	xmlHttp = GetXmlHttpObject()
	if (xmlHttp == null)
	{
		document.write ("Your browser doesn't support AJAX.")
		return
	}

	url = "getcalendar.php"
	url = url + "?cat=" + site_id + "&year=" + year + "&month=" + month
	
	xmlHttp.onreadystatechange = stateChanged
	xmlHttp.open("GET", url, true)
	xmlHttp.send(null)
}

function stateChanged()
{
	if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete")
	{
		document.getElementById("calendar").innerHTML = xmlHttp.responseText
	}
}

function GetXmlHttpObject()
{
	var objXMLHttp=null
	if (window.XMLHttpRequest)
	{
		objXMLHttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject)
	{
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}