I can update the google map marker position but I cannot update the google map position. It does not centres the map to the latitude and longitude position given

```
var myLatlng;
var map;
var infowindow;
var latitude;
var longtitude;
var marker;

loadMap();
function loadMap()
{
    myLatlng = new google.maps.LatLng(54.91252, -1.37664);

    var mapOptions = {
        zoom: 17,
        center: myLatlng
    };

    map = new google.maps.Map(document.getElementById("googlemaps"), mapOptions);
    var contentString = '<h5>The Mew </h5>';

    infowindow = new google.maps.InfoWindow({
        content: contentString
    });

    marker = new google.maps.Marker({
        position: myLatlng,
        map: map,
        title: "The Mew",
        animation: google.maps.Animation.DROP
    });

    google.maps.event.addListener(marker, 'click', function() {
        infowindow.open(map, marker);
    });
    infowindow.open(map, marker);
}

function updatePosition()
{
    latitude = document.getElementById('latitude');
    longtitude = document.getElementById('longtitude');
    myLatlng = new google.maps.LatLng(latitude, longtitude);
    marker.setPosition(myLatlng);
    map.setCenter(myLatlng);
}

  <input type="text" id="latitude" />
   <input type="text" id="longtitude" />
   <a onclick="updatePosition()" >update </a>

```