Openlayers 2 取消鼠标缩放地图的功能

        var map, layer;
        function init(){
            map = new OpenLayers.Map( ‘map‘);
            layer = new OpenLayers.Layer.OSM( "Simple OSM Map");
            map.addLayer(layer);
            map.setCenter(
                new OpenLayers.LonLat(-71.147, 42.472).transform(
                    new OpenLayers.Projection("EPSG:4326"),
                    map.getProjectionObject()
                ), 12
            );    
        }

        var map, layer;
        function init(){
            map = new OpenLayers.Map(‘map‘,{
                        controls: [
                            new OpenLayers.Control.Navigation({ ‘zoomWheelEnabled‘: false }),
                            new OpenLayers.Control.MousePosition(),
                            new OpenLayers.Control.Zoom()
                        ]
                    }
            );
            layer = new OpenLayers.Layer.OSM("Simple OSM Map");
            map.addLayer(layer);
            map.setCenter(
                new OpenLayers.LonLat(-71.147, 42.472).transform(
                    new OpenLayers.Projection("EPSG:4326"),
                    map.getProjectionObject()
                ), 12
            );    
        }