//<![CDATA[

    var map = new GMap(document.getElementById("map"));
    map.centerAndZoom(new GPoint(-92.3187,  34.7851), 13);
    map.addControl(new GSmallMapControl());
    map.addControl(new GMapTypeControl());

    function refreshMap(map)
    {
    // Download the data in data.xml and load it on the map. The format we
    // expect is:
    // <markers>
    //   <marker lat="37.441" lng="-122.141"/>
    //   <marker lat="37.322" lng="-121.213"/>
    // </markers>
    var request = GXmlHttp.create();
    request.open("GET", "data.xml?RANDOM=&#8221; + (Math.random() * Date.parse(new Date()))", true);
    request.onreadystatechange = function() {
      if (request.readyState == 4) {
        var xmlDoc = request.responseXML;
        var markers = xmlDoc.documentElement.getElementsByTagName("marker");
        map.clearOverlays();
        for (var i = 0; i < markers.length; i++) {
          var point = new GPoint(parseFloat(markers[i].getAttribute("lng")),
                                 parseFloat(markers[i].getAttribute("lat")));
          var marker = new GMarker(point);
          map.addOverlay(marker);
        }
      }
    }
    request.send(null);
    window.setTimeout(function(){refreshMap(map)},2000);
    }
    refreshMap(map);

    //]]>