var req;

function loadXMLDoc(url)

{

 req = null;

 if (window.XMLHttpRequest) 

  {

  req = new XMLHttpRequest();

  req.onreadystatechange = processReqChange;

  req.open("GET", url, true); 

  req.send(null);

  } 

 else 

  if (window.ActiveXObject) 

  {

    try 

    {

      req = new ActiveXObject("Msxml2.XMLHTTP.4.0");

    } 

    catch(e) 

    {

      try 

      {

      req = new ActiveXObject("Msxml2.XMLHTTP.3.0");

      } 

      catch(e) 

      {

        try 

        {

        req = new ActiveXObject("Msxml2.XMLHTTP");

        } 

        catch(e) 

        {

          try 

          {

          req = new ActiveXObject("Microsoft.XMLHTTP");

          } 

          catch(e) 

          {

          req = false;

          }

        }

      }

    }

    if (req) 

    {

      req.onreadystatechange = processReqChange;

      req.open("GET", url, true);

      req.send();

    }

  }

}



function processReqChange()

{

  if (req.readyState == 4) 

  {

    if (req.status == 200) 

      {

      document.getElementById("atualiza").innerHTML = req.responseText;

      } 

    else 

      {

      alert("Houve um problema ao obter os dados:\n" + req.statusText);

      }

  }

}