function initialize_ymap()
        {
            // Create a map object
            var map = new YMap(document.getElementById('ymap'));
          // Create a new marker for an address
          var myMarker = new YMarker("rue des Marchais La Pironniere 85180 LE CHATEAU D'OLONNE");
          // Create some content to go inside the SmartWindow
          var myMarkerContent = "<h3 class='carte'>Camping des M&ucirc;res***</h2><p class='carte'>83310 Grimaud<br />Var, Provence Alpes C&ocirc;te d'Azur (PACA)</p>";
          // Create latitude/longitude point
          var yPoint = new YGeoPoint(43.280650, 6.586855);
          // Create a new marker for an address
          var myMarker = new YMarker(yPoint);
            // Display the map centered on a geocoded location
            map.drawZoomAndCenter(yPoint, 6);
            // Add map type control  
      map.addTypeControl();  
      // Add zoom control
          map.addZoomLong();
          // Add the pan control
          map.addPanControl();
          // Add a label to the marker
          myMarker.addAutoExpand("<p class='carte'>Camping des M&ucirc;res***</p>");    
          // When the marker is clicked, show the SmartWindow
          YEvent.Capture(myMarker, EventsList.MouseClick,
            function() {
                myMarker.openSmartWindow(myMarkerContent); 
            });
          // Put the marker on the map
          map.addOverlay(myMarker);
        }