function load_calendar(month, year)
{
  $.ajax({
        type: "GET",
        url: "includes/calendar/calendar.php",
		data: "month="+month+"&year="+year,
		beforeSend: function(objeto){
				 document.getElementById("calendario").innerHTML = '<p><br /><br /><img src="img/preloader.gif" alt="" /></p>'; 
       	},
        success: function(datos){
        document.getElementById("calendario").innerHTML = datos; 
        }
	});
}//end