// To get current location from network
navigator.geolocation.getCurrentPosition(function(currentLocation) {
        // success
    },
    function() {
        // error
    }
);

// Google call to render MAP.
var mapOptions = {
    zoom: 8,
    center: new google.maps.LatLng(-34.397, 150.644),
    mapTypeControl: true,
    mapTypeControlOptions: {
        style: google.maps.MapTypeControlStyle.DROPDOWN_MENU
    },
    zoomControl: true,
    zoomControlOptions: {
        style: google.maps.ZoomControlStyle.SMALL
    },
    mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_area'), mapOptions);

// Reverse Geocode - get address from lat long.
(new google.maps.Geocoder()).geocode({latLng: latLng}, function(resp) {
    if (resp[0]) {
        for (var i = 0, I = resp[0].address_components.length; i < I; ++i) {
            var component = resp[0].address_components[i];
            if (contains(component.types, 'political')) {
                ....
            }
        }
    }
});