var req;
var url;
var camada;
function loadXMLDoc(url,aux) //rotina AJAX
{
    camada = aux;	
    // branch for Mozilla/FireFox
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processaInfo;
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processaInfo;
            req.open("GET", url, true);
            req.send();
        }
    }
}
function processaInfo(){
    if (req.readyState == 1)
         document.getElementById(camada).innerHTML = "<br><br><br><br><br><center><img src=images/carregando.gif ></center>";
    if (req.readyState == 4)
      if (req.status == 200){ //Retorno positivo
         msg  = req.responseText; //mensagem
         document.getElementById(camada).innerHTML = msg;
	}
    else
         document.getElementById(camada).innerHTML = req.responseText;
}