//<![CDATA[

    document.getElementById("map").style.width=""+Math.round(window.screen.width * 0.77)+"px";
    document.getElementById("map").style.height=""+Math.round(window.screen.height * 0.67)+"px";

    if (GBrowserIsCompatible()) {
      var sidebar_html = "";
      var gmarkers = [];
      var htmls = [];
      var i = 0;

      function createMarker(point,name,html) {
        var marker = new GMarker(point);
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });
        // save the info we need to use later for the sidebar
        gmarkers[i] = marker;
        htmls[i] = html;
        // add a line to the sidebar html
        sidebar_html += '<a onclick="javascript:popNewWindow(' + i + ')" class="sidebar">' + name + '</a><br /><br />';
        i++;
        return marker;
      }

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

      // create the map
      var map = new GMap2(document.getElementById("map"));
      map.addControl(new GLargeMapControl());
      map.addControl(new GMapTypeControl());
      map.setCenter(new GLatLng(42.340576504533985,-71.08656406402588), 16);

      var request = GXmlHttp.create();
      request.open("GET", "locations.xml", true);
      request.onreadystatechange = function() {
        if (request.readyState == 4) {
          var xmlDoc = request.responseXML;
          // 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 label = markers[i].getAttribute("label");
            var html = "<span class='windowTitle'>" + label + "</span><p class='window'>" + GXml.value(markers[i].getElementsByTagName("infowindow")[0]) + "</p>";
            // create the marker
            var marker = createMarker(point,label,html);
            map.addOverlay(marker);
          }
          // put the assembled sidebar_html contents into the sidebar div
          document.getElementById("sidebar").innerHTML = sidebar_html;
        }
      }
      request.send(null);
    }

    else {
      alert("Sorry, the Google Maps API is not compatible with this browser");
    }

    //]]>