//<![CDATA[

    if (GBrowserIsCompatible()) {
      var side_bar_html = "";
      var gmarkers = [];
      var htmls = [];
      // arrays to hold variants of the info window html with get direction forms open
      var to_htmls = [];
      var from_htmls = [];


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


        var i = gmarkers.length;

        // The info window version with the "to here" form open
        to_htmls[i] = html + '<div style="width: 200px;">Directions: <b>To here<\/b> - <a href="javascript:fromhere(' + i + ')">From here<\/a>' +
           '<hr>Start address:<form action="javascript:getDirections()" style="margin: 0px;">' +
           '<input type="text" SIZE=30 MAXLENGTH=40 name="saddr" id="saddr" value="" /><br>' +
           '<INPUT value="Get Directions" TYPE="SUBMIT"><br>' +
           'Walk <input type="checkbox" name="walk" id="walk" />   Avoid Highways <input type="checkbox" name="highways" id="highways" />' +
           '<input type="hidden" id="daddr" value="'+name+"@"+ point.lat() + ',' + point.lng() + 
           '"/></div>';
        // The info window version with the "from here" form open
        from_htmls[i] = html + '<div style="width: 200px;">Directions: <a href="javascript:tohere(' + i + ')">To here<\/a> - <b>From here<\/b>' +
           '<hr>End address:<form action="javascript:getDirections()" style="margin: 0px;">' +
           '<input type="text" SIZE=30 MAXLENGTH=40 name="daddr" id="daddr" value="" /><br>' +
           '<INPUT value="Get Directions" TYPE="SUBMIT"><br>' +
           'Walk <input type="checkbox" name="walk" id="walk" />   Avoid Highways <input type="checkbox" name="highways" id="highways" />' +
           '<input type="hidden" id="saddr" value="'+name+"@"+ point.lat() + ',' + point.lng() +
           '"/></div>';
        // The inactive version of the direction info
        html = html + 'Directions: <a href="javascript:tohere('+i+')">To here<\/a> - <a href="javascript:fromhere('+i+')">From here<\/a>';

        GEvent.addListener(marker, "mouseover", function() {
          marker.openInfoWindowHtml(html);
        });
        // save the info we need to use later for the side_bar
        gmarkers.push(marker);
        htmls[i] = html;
        // add a line to the side_bar html
        side_bar_html += '<a href="javascript:myclick(' + i + ')">Click here for directions<\/a> - Once directions are displayed, click on any step for further detail.';
        return marker;
      }

      // ===== request the directions =====
      function getDirections() {
        // ==== Set up the walk and avoid highways options ====
        var opts = {};
        if (document.getElementById("walk").checked) {
           opts.travelMode = G_TRAVEL_MODE_WALKING;
        }
        if (document.getElementById("highways").checked) {
           opts.avoidHighways = true;
        }
        // ==== set the start and end locations ====
        var saddr = document.getElementById("saddr").value
        var daddr = document.getElementById("daddr").value
        gdir.load("from: "+saddr+" to: "+daddr, opts);
      }


      // 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]);
      }

      // create the map
      var map = new GMap2(document.getElementById("map"));
      map.addControl(new GLargeMapControl());
      map.addControl(new GMapTypeControl());
      map.setCenter(new GLatLng(41.298951, -72.925984), 15);

      // === create a GDirections Object ===
      var gdir=new GDirections(map, document.getElementById("directions"));

      // === Array for decoding the failure codes ===
      var reasons=[];
      reasons[G_GEO_SUCCESS]            = "Success";
      reasons[G_GEO_MISSING_ADDRESS]    = "Missing Address: The address was either missing or had no value.";
      reasons[G_GEO_UNKNOWN_ADDRESS]    = "Unknown Address:  No corresponding geographic location could be found for the specified address.";
      reasons[G_GEO_UNAVAILABLE_ADDRESS]= "Unavailable Address:  The geocode for the given address cannot be returned due to legal or contractual reasons.";
      reasons[G_GEO_BAD_KEY]            = "Bad Key: The API key is either invalid or does not match the domain for which it was given";
      reasons[G_GEO_TOO_MANY_QUERIES]   = "Too Many Queries: The daily geocoding quota for this site has been exceeded.";
      reasons[G_GEO_SERVER_ERROR]       = "Server error: The geocoding request could not be successfully processed.";
      reasons[G_GEO_BAD_REQUEST]        = "A directions request could not be successfully parsed.";
      reasons[G_GEO_MISSING_QUERY]      = "No query was specified in the input.";
      reasons[G_GEO_UNKNOWN_DIRECTIONS] = "The GDirections object could not compute directions between the points.";

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

        alert("Failed to obtain directions, "+reason);
      });



      // Read the data from example.xml
      var request = GXmlHttp.create();
      request.open("GET", "../../service_info/stations/xml/nh_u.xml", true);
      request.onreadystatechange = function() {
        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);
          }
          // put the assembled side_bar_html contents into the side_bar div
          document.getElementById("side_bar").innerHTML = side_bar_html;
        }
      }
      request.send(null);
	  
    } else {
      alert("Sorry, the Google Maps API is not compatible with this browser");
    }