function getTown(latitude,longitude){

    // Define Geocoding
    var geocoder = new google.maps.Geocoder();

    // Using the longitude / latitude get address details
    var latlng  = new google.maps.LatLng(latitude,longitude);

    geocoder.geocode({'latLng': latlng}, function(results, status){

        // If response ok then get details
        if (status == google.maps.GeocoderStatus.OK) {
            var town = results[1].address_components[1].long_name;

            return town; // Returns Norwich when alerted using the e.g below.
        }
    });
}

getTown(52.649334,1.288052);

var theTown = null;
function getTown(latitude,longitude){

// Define Geocoding
var geocoder = new google.maps.Geocoder();

// Using the longitude / latitude get address details
var latlng  = new google.maps.LatLng(latitude,longitude);

geocoder.geocode({'latLng': latlng}, function(results, status){

    // If response ok then get details
    if (status == google.maps.GeocoderStatus.OK) {
        var town = results[1].address_components[1].long_name;

        theTown = town; // Returns Norwich when alerted using the e.g below.
    }
});
}