var map;
    var gdir;
    var request;

      var side_bar_html = "";
      var gmarkers = [];
      var htmls = [];
      var i = 0;
      // Arrays to hold variants of the info window html with get direction forms open
      var to_htmls = [];
      var from_htmls = [];
      var completeHtml = '';


      // Array for decoding the failure codes
      var reasons=[];
      reasons[G_GEO_SUCCESS]            = "Succes";
      reasons[G_GEO_MISSING_ADDRESS]    = "Vul een geldig adres in a.u.b.";
      reasons[G_GEO_UNKNOWN_ADDRESS]    = "Adres niet gevonden.";
      reasons[G_GEO_UNAVAILABLE_ADDRESS]= "De coordinaten van het opgegeven adres kunnen niet worden gevonden.";
      reasons[G_GEO_BAD_KEY]            = "De opgegeven API sleutel is ongeldig of komt niet overeen met het gebruikte domein.";
      reasons[G_GEO_TOO_MANY_QUERIES]   = "Maximale aantal zoekacties per dag is overschreden.";
      reasons[G_GEO_SERVER_ERROR]       = "Server error, uw verzoek kan niet behandeld worden.";
      reasons[G_GEO_BAD_REQUEST]        = "Uw route kan niet bepaald worden. Controleer het start adres.";
      reasons[G_GEO_MISSING_QUERY]      = "Ongeldig adres.";
      reasons[G_GEO_UNKNOWN_DIRECTIONS] = "Geen route beschikbaar.";


      // A function to create the marker and set up the event window
      function createMarker(point,name,html) {
        var marker = new GMarker(point);

        // The info window version with the "to here" form open
        to_htmls[i] = html + 
           '<br>Start adres:<form action="javascript:getDirections()">' +
           '<input type="text" SIZE=40 MAXLENGTH=40 name="saddr" id="saddr" value="" /><input type="checkbox" id="nl" checked="checked" />NL<br>' +
           '<INPUT value="Plan route" TYPE="SUBMIT">' +
           '<input type="hidden" id="daddr" value="'+name+"@"+ point.lat() + ',' + point.lng() + 
           '"/>'
       
        // The inactive version of the direction info
        if(googleMapsSettings["showDirections"] == true) {
        
        html = html + '<br><a href="javascript:tohere('+i+')">Route plannen</a>';
        }
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });
        // Save the info we need to use later for the side_bar
        gmarkers[i] = marker;
        htmls[i] = html;
        // Add a line to the side_bar html
        side_bar_html += '<a href="javascript:myclick(' + i + ')">' + name + '</a><br>';
        i++;
        completeHtml = html;
        return marker;
        
      }

      // Request the directions
      function getDirections() {
      if(document.getElementById("nl").checked == true){
          var saddr = document.getElementById("saddr").value + ",nl"
          }
          else{
          var saddr = document.getElementById("saddr").value
          }
        var daddr = document.getElementById("daddr").value
        gdir.load("from: "+saddr+" to: "+daddr);
        map.closeInfoWindow(); 
      }

      // This function picks up the click and opens the corresponding info window
      function myclick(i) {
        gmarkers[i].openInfoWindowHtml(htmls[i]);
      }

      // Functions that open the directions forms
      function tohere(i) {
        gmarkers[i].openInfoWindowHtml(to_htmls[i]);
      }
      function fromhere(i) {
        gmarkers[i].openInfoWindowHtml(from_htmls[i]);
      }

      function loadXml() {
              if (request.readyState == 4) {
          var xmlDoc = GXml.parse(request.responseText);
          // Obtain the array of markers and loop through it
          var markers = xmlDoc.documentElement.getElementsByTagName("marker");

          for (var i = 0; i < markers.length; i++) {
            // Obtain the attribues of each marker
            var lat = parseFloat(markers[i].getAttribute("lat"));
            var lng = parseFloat(markers[i].getAttribute("lng"));
            var point = new GLatLng(lat,lng);
            var html = markers[i].getAttribute("html");
            var label = markers[i].getAttribute("label");
            // Create the marker
            var marker = createMarker(point,label,html);
            map.addOverlay(marker);
            marker.openInfoWindowHtml(completeHtml);
          }
          // Put the assembled side_bar_html contents into the side_bar div
          document.getElementById("side_bar").innerHTML = side_bar_html;
        }
      }
      function addGoogleMap() {

        // Create the map
        map = new GMap2(document.getElementById("map"));
        map.setCenter(new GLatLng(51.15,5.77046), 9);
        map.addControl(new GSmallZoomControl());
        
        // Create a GDirections Object
        gdir=new GDirections(map, document.getElementById("directions"));

        // Catch Directions errors
        GEvent.addListener(gdir, "error", function() {
          var code = gdir.getStatus().code;
          var reason="Code "+code;
          if (reasons[code]) {
            reason = reasons[code]
          } 

          alert(reason);
        });

        // Read the data from marker.xml
        request = GXmlHttp.create();
        request.open("GET", googleMapsSettings["linkToXML"], true);
        request.onreadystatechange = function() {
          loadXml();
        }
        request.send(null);
      }