var xmlHttp

function handleDivTag(divtag){ 
   var divtag; 
   return divtag; 
} 

var divhandler = new handleDivTag(null); 

function showCalendar(m,y){ 
	var url="ajax-calendar.php?m="+m+"&y="+y
	xmlHttp=GetXmlHttpObject(stateChanged)
	xmlHttp.open("GET", url , true)
	divhandler.divtag = "calendar"; 
	xmlHttp.send(null)
} 

function stateChanged(){ 
	if(xmlHttp.readyState>1 && xmlHttp.readyState<4){
		document.getElementById(divhandler.divtag).innerHTML = "<center><bR><br><img src='images/indicator.gif'></center>";
	}
	
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
    	document.getElementById(divhandler.divtag).innerHTML=xmlHttp.responseText
	} 
} 


function GetXmlHttpObject(handler)
{ 
	var objXmlHttp=null
	
	if (navigator.userAgent.indexOf("Opera")>=0){
		alert("This example doesn't work in Opera") 
		return 
	}
	
	if (navigator.userAgent.indexOf("MSIE")>=0){ 
		var strName="Msxml2.XMLHTTP"	
		if (navigator.appVersion.indexOf("MSIE 5.5")>=0){
			strName="Microsoft.XMLHTTP"
		}try{ 
			objXmlHttp=new ActiveXObject(strName)
			objXmlHttp.onreadystatechange=handler 
			return objXmlHttp
		}catch(e){ 
			alert("Error. Scripting for ActiveX might be disabled") 
			return 
		} 
	} 
	
	if (navigator.userAgent.indexOf("Mozilla")>=0){
		objXmlHttp=new XMLHttpRequest()
		objXmlHttp.onload=handler
		objXmlHttp.onerror=handler 
		return objXmlHttp
	}
}