function getCalendar(month, year) 
{
   	var HttpRequest = false;
   	var request = "month="+month+"&year="+year;
   	var object = "calendar";

    if(window.XMLHttpRequest)
    {
    	HttpRequest = new XMLHttpRequest();
    } 
    else if(window.ActiveXObject) 
    {
      	HttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
    }
	  
    HttpRequest.open('POST', 'include/calendar_init.php', true);
    HttpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    HttpRequest.onreadystatechange = function()
	{
        if (HttpRequest.readyState == 4) {
            update(HttpRequest.responseText, object);
        }
    }
    HttpRequest.send(request);
    
    return false;
}
	
function update(str, object)
{
    document.getElementById(object).innerHTML = str;
}