I'm using this function to add a new marker (and polyline) to a map:

 function addMarker(location) {



    path = poly.getPath();

    path.push(location);

    marker = new google.maps.Marker({

        position: location,

        icon:'location.png',

        title: poly.inKm() + ' km',

        map: map

    });

    markersArray.push(marker);

}

How can I remove the last marker (for implementing undo)?

Best regards ...