Google Maps API - Pegar a latitude e longitude de um endereço

gmaps-lat-lon.js

window.geocoder = new google.maps.ClientGeocoder();
geocoder.getLocations('rua xyz, sp', function(result){
var placemark = result.Placemark[0]; // Only use first result
    var accuracy = placemark.AddressDetails.Accuracy;
    var zoomLevel = 1;
    var lon = placemark.Point.coordinates[0];
    var lat = placemark.Point.coordinates[1];
    gmap.setCenter(new google.maps.LatLng(lat, lon), zoomLevel);
});


//-----------------------
// ou
//-----------------------

// Apenas retorna latitude e longitude
function GetLocation(address) {
    var geocoder = new google.maps.Geocoder();
    geocoder.geocode({ 'address': address }, function (results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
            var latitude = results[0].geometry.location.lat();
            var longitude = results[0].geometry.location.lng();
            alert("Latitude: " + latitude + "\nLongitude: " + longitude);
        } else {
            alert("Request failed.")
        }
    });
};