var map = null;
  var geocoder = null;
  var xmlhttp = null;
  if (window.XMLHttpRequest) {
    xmlhttp = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  }
  
  function load(e) 
      {
        if (GBrowserIsCompatible()) 
        {
          map = new GMap2(document.getElementById("map"));
          geocoder = new GClientGeocoder();  
          placeMarkers(document.getElementById("address").value, e);
          
          GDownloadUrl("data.xml", function(data, responseCode) {
    var xml = GXml.parse(data);
    var markers = xml.documentElement.getElementsByTagName("marker");
    
    if (markers.length > 0)
    {
    point2 = new GLatLng(parseFloat(markers[0].getAttribute("lat")), parseFloat(markers[0].getAttribute("lng")));
    map.setCenter(point2, 13);
    }
    else
    {
    
    geocoder.getLatLng("Paris", function(point){map.setCenter(point, 13)}); 
    }
  });       
        }
      }
      
      function placeInXmlFile(point)
      {
                     var xml = null;
        if (window.ActiveXObject)
        {
              xml = new ActiveXObject("Microsoft.XMLDOM");
              xml.async = false;
              xml.load("data.xml");               
        }
        else
        {     
              xml = document.implementation.createDocument("","", null);
              xml.async = false;
              xml.load("data.xml");
        }
  
        var newmarker =  xml.getElementsByTagName("markers")[0];
        newtag = xml.createElement("marker");
        newmarker.appendChild(newtag);
        
        newtag.setAttribute("lat", point.y);
        newtag.setAttribute("lng", point.x); 
        newtag.setAttribute("address", address.value); 
        
       xmlhttp.abort();
       var xmlToSave = xml.xml || (new XMLSerializer().serializeToString(xml));
       var xmlcode = encodeURIComponent(xmlToSave);
       alert("yes3");
       var url = "Save.php?xml=" + xmlcode;
       xmlhttp.open("GET", url, true);
       xmlhttp.setRequestHeader("Content-Type", "text/xml" );
       xmlhttp.send(null);
  
       
   }
  
  function placeMarkers(address, e)
  {
  if (e == "true")
  {
  geocoder.getLatLng(address, function(point) {
        if (!point) {
          alert(address + " not found");
        } else {
          map.setCenter(point, 13);
         var marker = new GMarker(point);
          map.addOverlay(marker);
          marker.openInfoWindowHtml(address);
          placeInXmlFile(point, address);          
        }
      });
  }
  GDownloadUrl("data.xml", function(data, responseCode) {
    var xml = GXml.parse(data);
    var markers = xml.documentElement.getElementsByTagName("address");
    for (var i = 0; i < markers.length; i++) {
     
      point2 = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
                              parseFloat(markers[i].getAttribute("lng")));
                              map.setCenter(point2, 13);
      marker2 = new GMarker(point2);
      map.addOverlay(marker2);
      marker2.openInfoWindowHtml(markers[i].getAttribute("address"));
    }
  
  });
  }