//  loadXMLDoc Function
//
var xmlhttp;


function loadXMLDoc(url)
{
  xmlhttp=null;
  if (window.XMLHttpRequest) {
    // code for IE7, Firefox, Mozilla, etc.
    xmlhttp=new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    // code for IE5, IE6
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (xmlhttp!=null) {
    xmlhttp.onreadystatechange=onResponse;
    xmlhttp.open("GET",url,false);
    xmlhttp.send(null);
  } else {
    alert("Your browser does not support XMLHTTP.");
  }
}


function onResponse()
{
  if(xmlhttp.readyState!=4) return;
  if(xmlhttp.status!=200) {
    alert("Problem retrieving XML data");
    return;
  }
}