//Detects browser type 
function makeObject(){
var x; 
var browser = navigator.appName; 
if(browser == "Microsoft Internet Explorer"){
x = new ActiveXObject("Microsoft.XMLHTTP");
}else{
x = new XMLHttpRequest();
}
return x;
}

//Call function 
var request = makeObject();


//The get method AJAX 
function get_method(action, url, listingID)
{
	var start_month = document.getElementById("start_month").value;
	var start_year = document.getElementById("start_year").value;
	var URL = url + "/get_avail_cal.php?listingID="+listingID+"&action="+action+"&month="+start_month+"&year="+start_year;
	request.open('get', URL);

	request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	request.onreadystatechange = output; 
	request.send('');
}


//The POST method AJAX 

function output()
{
if(request.readyState == 4){
var data = request.responseText;
document.getElementById('avail_cal').innerHTML = data;
}
}