google.maps.Geocoder.js

var gMapsApi = window.google.maps;
var map = new gMapsApi.Map(/*...*/);
var geocoder = new gMapsApi.Geocoder();
geocoder.geocode({ address:$('[name="q"]').val() }, function(results, status) {
	if(status == gMapsApi.GeocoderStatus.OK) {
		map.setCenter(results[0].geometry.location);
	} else {
		console.log('Geocode was not successful for the following reason: ' + status);
	}
});