//<![CDATA[

    if (GBrowserIsCompatible()) {
      var gmarkers = [];
      var gicons = [];

      gicons["theatre"] = new GIcon(G_DEFAULT_ICON,"http://www.profel.nl/media/img/frameset/marker.png");
      //gicons["golf"] = new GIcon(G_DEFAULT_ICON,"http://www.profel.nl/media/img/frameset/marker.png");
      //gicons["info"] = new GIcon(G_DEFAULT_ICON,"http://www.profel.nl/media/img/frameset/marker.png");

      // A function to create the marker and set up the event window
      function createMarker(point,name,html,category) {
        var marker = new GMarker(point,gicons[category]);
        // === Store the category and name info as a marker properties ===
        marker.mycategory = category;                                 
        marker.myname = name;
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });
        gmarkers.push(marker);
        return marker;
      }

      // == shows all markers of a particular category, and ensures the checkbox is checked ==
     /* function show(category) {
        for (var i=0; i<gmarkers.length; i++) {
          if (gmarkers[i].mycategory == category) {
            gmarkers[i].show();
          }
        }
        // == check the checkbox ==
        document.getElementById(category+"box").checked = true;
      }*/

      // == hides all markers of a particular category, and ensures the checkbox is cleared ==
     /* function hide(category) {
        for (var i=0; i<gmarkers.length; i++) {
          if (gmarkers[i].mycategory == category) {
            gmarkers[i].hide();
          }
        }
        // == clear the checkbox ==
        document.getElementById(category+"box").checked = false;
        // == close the info window, in case its open on a marker that we just hid
        map.closeInfoWindow();
      }*/

      // == a checkbox has been clicked ==
     /* function boxclick(box,category) {
        if (box.checked) {
          show(category);
        } else {
          hide(category);
        }
        // == rebuild the side bar
        makeSidebar();
      }*/

      function myclick(i) {
        GEvent.trigger(gmarkers[i],"click");
      }


      // == rebuilds the sidebar to match the markers currently displayed ==
   /*   function makeSidebar() {
        var html = "";
        for (var i=0; i<gmarkers.length; i++) {
          if (!gmarkers[i].isHidden()) {
            html += '<a href="javascript:myclick(' + i + ')">' + gmarkers[i].myname + '</a><br>';
          }
        }
        document.getElementById("side_bar").innerHTML = html;
      }
*/

      // create the map
      var map = new GMap2(document.getElementById("map"));
      map.addControl(new GLargeMapControl());
      map.addControl(new GMapTypeControl());
      map.setCenter(new GLatLng(50.500000,3.500000),7);


      // Read the data
      GDownloadUrl("http://www.profel.nl/media/xml/categories.xml", function(doc) {
        var xmlDoc = GXml.parse(doc);
        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 address = markers[i].getAttribute("address");
          var name = markers[i].getAttribute("name");
          var html = "<b>"+name+"</b><br /><br />"+address;
          var category = markers[i].getAttribute("category");
          // create the marker
          var marker = createMarker(point,name,html,category);
          map.addOverlay(marker);
        }

        // == show or hide the categories initially ==
       // show("theatre");
       // hide("golf");
       // hide("info");
        // == create the initial sidebar ==
       //makeSidebar();
      });
    }

    else {
      alert("Sorry, the Google Maps API is not compatible with this browser");
    }
    // This Javascript is based on code provided by the
    // Blackpool Community Church Javascript Team
    // http://www.commchurch.freeserve.co.uk/   
    // http://econym.googlepages.com/index.htm

    //]]>// JavaScript Document