I'm using google maps. In my code i've used setCenter() function. My problem is that marker is always located on top left corner of map area (not at the center). Please tell me how to resolve it?

My piece of code is

 lat = 46.437857;
        lon = -113.466797;

            marker = new GMarker(new GLatLng(lat, lon));


            var topRight = new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(20, 40));
            map.addControl(new GLargeMapControl3D(), topRight);
            map.setCenter(new GLatLng(lat, lon), 5);

            map.addOverlay(marker);