Fetching current address

Fetching current address using GeoLocation and Google Map

HTML

<script src="https://maps.googleapis.com/maps/api/js?sensor=true"></script>
<input type='button' value='Find Address' onclick="getLocation();">
<div id="address">  </div> 
<div id="map_canvas" valign='top' ></div>

CSS

body{ padding:0px; margin:20px;}
#map_canvas {width:450px; height:450px;  margin:10px 0px; }

JavaScript

var map;
var infowindow;
google.maps.event.addDomListener(window, "load", function () {

var latlng = new google.maps.LatLng(34,-117.5);
map = new google.maps.Map(document.getElementById('map_canvas'), {
  zoom: 8,
  center: latlng, 
  zoomControl: true,
  scaleControl: true, 
  mapTypeId: google.maps.MapTypeId.ROADMAP
}); 
infoWindow = new google.maps.InfoWindow(); 
});


function getLocation() {
var options = {
  enableHighAccuracy: true,
  timeout: 30000,
  maximumAge: 300
};
if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(showPosition,errorPostion,options );
}  
}
function showPosition(position) { 
    var lat=position.coords.latitude;
    var lng=position.coords.longitude; 
    var point = new google.maps.LatLng(lat, lng);
	map.panTo(point);
    findAddress(point);
} 
function errorPostion(error) { 
	 switch(error.code) {
        case error.PERMISSION_DENIED:
            errorMessage = "User denied the request for Geolocation."
            break;
        case error.POSITION_UNAVAILABLE:
            errorMessage = "Location information is unavailable."
            break;
        case error.TIMEOUT:
            errorMessage = "The request to get user location timed out."
            break;
        case error.UNKNOWN_ERROR:
            errorMessage = "An unknown error occurred."
            break;
    }
    alert("Error : " + errorMessage);
}
 
function findAddress(point) {
var geocoder = new google.maps.Geocoder();
	geocoder.geocode({latLng: point}, function(results, status) {
		if (status == google.maps.GeocoderStatus.OK) {
			if (results[0]) {
				document.getElementById('address').innerHTML=results[0].formatted_address;
				infoWindow.setContent(results[0].formatted_address);
				infoWindow.setPosition(point);
				infoWindow.open(map);
			}
		}
	});
}