JavaScript to get Map Center Coords

google.maps.event.addListener(
    map, "dblclick", function(
        overlay, latlng, overlaylatlng
    ) {
        // var point = new GLatLng( latlng.y, latlng.x );
        //document.getElementById("log").innerHTML = map.getCenter().toString();
        document.getElementById("log").innerHTML = '|' + map.getCenter().lat().toFixed(6) + ' |' + map.getCenter().lng().toFixed(6);
    });