var xmlHttp_formatui = null;

function gauti_formatus()
{
  xmlHttp_formatui = GetXmlHttpObject();
  var url = "return.php?type=pletinys";
  var method = "get";
  var data = null;
  var duom_tipas = null;  
  duom_tipas = document.getElementById("duom_tipas").value; 
  if (null != duom_tipas)
    url += "&dtipas=" + duom_tipas;
  xmlHttp_formatui.onreadystatechange = formatai;
  xmlHttp_formatui.open(method, url, true);
  xmlHttp_formatui.send(data);
}

function formatai()
{
  if ((xmlHttp_formatui.readyState == 4)&&(xmlHttp_formatui.status == 200))
  {
    var xmlDoc = xmlHttp_formatui.responseXML;
    options = xmlDoc.getElementsByTagName("OPTION");
    document.getElementById("formatas").innerHTML = "";
    for (var i = 0; i < xmlDoc.getElementsByTagName("OPTION").length; i++)
    {
      var option = document.createElement("option");
      option.setAttribute("value", options[i].getAttribute('id'));
      option.innerHTML = options[i].childNodes[0].nodeValue;
      document.getElementById("formatas").appendChild(option);
    }
  }
}