Carte OpenStreetMap avec des marqueurs et infobulles

Exemple de code javascript pour cette carte

<script src="http://www.openlayers.org/api/OpenLayers.js"></script>
  <script>
    map = new OpenLayers.Map("carte");
	
    map.addLayer(new OpenLayers.Layer.OSM());
	
	epsg4326 = new OpenLayers.Projection("EPSG:4326");
	projectTo = map.getProjectionObject();
	
    
	map.addControl(new OpenLayers.Control.MousePosition({'numDigits':6,
							'granularity':10,'separator':' | ', 
							'prefix': 'Coordonnées ',
							displayProjection: new OpenLayers.Projection("EPSG:4326")}));
    

   // Centrer la carte ----------------------------------------------------------------------
    var lonLat = new OpenLayers.LonLat( 2.341303,48.855141 ).transform(epsg4326, projectTo);
       
    var zoom=12;
    map.setCenter (lonLat, zoom);

    var vectorLayer = new OpenLayers.Layer.Vector("Overlay");
    
    // Configuration des différents marqueurs et infobulles(popup):
    var feature = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point( 2.294504,48.858307 ).transform(epsg4326, projectTo),
            {description:'La Tour Eiffel'} ,
            {externalGraphic: 'http://webinfotuto.free.fr/rubriques/siteweb/OpenStreetMap/images/markers/vert.png', graphicHeight: 36, graphicWidth: 36, graphicXOffset:-12, graphicYOffset:-25  }
        );    
    vectorLayer.addFeatures(feature);
    
    var feature = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point( 2.326733,48.863777 ).transform(epsg4326, projectTo),
            {description:'Le jardin des Tuileries'} ,
            {externalGraphic: 'http://webinfotuto.free.fr/rubriques/siteweb/OpenStreetMap/images/markers/bleufonce.png', graphicHeight: 36, graphicWidth: 36, graphicXOffset:-12, graphicYOffset:-25  }
        );    
    vectorLayer.addFeatures(feature);

    var feature = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point( 2.394497,48.861173 ).transform(epsg4326, projectTo),
            {description:'Le cimetière du père Lachaise'} ,
            {externalGraphic: 'http://webinfotuto.free.fr/rubriques/siteweb/OpenStreetMap/images/markers/marron.png', graphicHeight: 36, graphicWidth: 36, graphicXOffset:-12, graphicYOffset:-25  }
        );    
    vectorLayer.addFeatures(feature);

   
    map.addLayer(vectorLayer);
 
    
    //Paramétrage de l'ouverture et la fermeture des infobulles
    var parametres = {
      selection: new OpenLayers.Control.SelectFeature(vectorLayer, { onSelect: createPopup, onUnselect: fermeturePopup })
    };

    function createPopup(feature) {
      feature.popup = new OpenLayers.Popup.FramedCloud("pop",
          feature.geometry.getBounds().getCenterLonLat(),
          null,
          '
'+feature.attributes.description+'
',
          null,
          true,
          function() { parametres['selection'].unselectAll(); }
      );
     map.addPopup(feature.popup);
    }

    function fermeturePopup(feature) {
     feature.popup.destroy();
     feature.popup = null;
   }
    
   map.addControl(parametres['selection']);
   parametres['selection'].activate();
 </script>