google maps v3 geocoder

mapper.js

/*
require: jquery
add:
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=true"></script>
*/

var Mapper = function( map_canvas, options ){
	var map_canvas = document.getElementById(map_canvas || "map_canvas");
	this.markersArray = [];
	this.infoWindow = new google.maps.InfoWindow();

	this.options = {
		center: new google.maps.LatLng(28.291564, -16.53913),
		zoom: 16,
		mapTypeId: google.maps.MapTypeId.ROADMAP
	};
	
	this.options = $.extend(this.options, options || {}); 
	
	this.map = new google.maps.Map(map_canvas, this.options);
	
	this.addMarker = function( m_options, center ) {
		var that = this;
		var marker = new google.maps.Marker( m_options );
		marker.setMap(this.map);
		if (center) this.map.setCenter(m_options.position);
		
		if (m_options.content){
		    marker.content = m_options.content;
			google.maps.event.addListener(marker, 'click', function() {
				that.openInfoWindow(marker);
			});
		}
		this.markersArray.push(marker);
		return marker;
	};
	
	this.manualGeocode = function( marker, callback ){
		google.maps.event.addListener(marker, 'drag', function() {
			geocoder.geocode({'latLng': marker.getPosition()}, function(results, status) {
			  if (status == google.maps.GeocoderStatus.OK) {
				if (results[0]) {
				  callback(marker.getPosition().lat(), marker.getPosition().lng());
				}
			  }
			});
		});
	};
	
	this.clearOverlays = function() {
	  if (this.markersArray) {
		for (var i in this.markersArray) {
		  this.markersArray[i].setMap(null);
		}
	  }
	};
	
	this.codeAddress = function ( address, callback ) {
		geocoder = new google.maps.Geocoder();
		that = this;
		geocoder.geocode( { 'address': address}, function(results, status) {
			if (status == google.maps.GeocoderStatus.OK) {
				that.map.setCenter(results[0].geometry.location);
				var marker = that.addMarker( {position: results[0].geometry.location, draggable: true });
				if (callback !== undefined){
					callback(results[0].geometry.location.lat(), results[0].geometry.location.lng());
				}
				that.manualGeocode(marker, callback);
			} else {
				alert("Sentimos. No se ha conseguido localizar la dirección: " + status);
			}
		});
	};

	this.setCurrentPoint = function( name ){
		this.addMarker( { position: this.options.center } );
	};

	this.openInfoWindow = function(marker, content) {
		this.infoWindow.setContent(content || marker.content);
		this.infoWindow.open(this.map, marker);
	};

	this.closeInfoWindow = function() { this.infoWindow.close(); };

	// Make the info window close when clicking anywhere on the map.
	google.maps.event.addListener(this.map, 'click', this.closeInfoWindow);	

	return this;
}