function createRequestObject() {
		var ro;
		var browser = navigator.appName;
		if(browser == "Microsoft Internet Explorer"){
			ro = new ActiveXObject("Microsoft.XMLHTTP");
		}else{
			ro = new XMLHttpRequest();
		}
		return ro;
	}
	
	var http = createRequestObject();
	function sndReq(action) {
		http.open('get', action);
		http.onreadystatechange = handleResponse;
		http.send(null);
	}
	function handleResponse() {
		if(http.readyState == 4){
			document.getElementById('txtHint').innerHTML = http.responseText;
		}
		
	}
	function showCalender(y,m) {
		var val = 'calender_display.php?sid=' + Math.random() + '&y='+y+'&m='+m; 
		sndReq(val);
		return false;
	}