var xmlhttp;

try{
    xmlhttp = new XMLHttpRequest();
}catch(ee){
    try{
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    }catch(e){
        try{
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }catch(E){
            xmlhttp = false;
        }
    }
}
	
	
var ajax = {
	//ajax busca bairro
	carrega_mes : function(valor) { 

		param = "&cod="+valor;
		xmlhttp.open("POST", "calendario.php", true);
		xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		
		xmlhttp.onreadystatechange = function(){
			if(xmlhttp.readyState == 4) { 
				if(xmlhttp.status == 200){ 
					document.getElementById('calendarioNew').innerHTML = xmlhttp.responseText; 
				} else { //Não encotra os dados
					alert("Erro: returned status code " + xmlhttp.status + " " + xmlhttp.statusText);
				}
			}
		}
		xmlhttp.send(param);
	} 
}