HTML5 Geolocation script example

location.js

var map;
    var geocoder;

    function addAddressToMap(response) 
    {
        map.clearOverlays();
        if (!response || response.Status.code != 200) 
        {
            alert("Sorry, we were unable to geocode that address");
        } 
        else 
        {
            place = response.Placemark[0];
            point = new GLatLng(place.Point.coordinates[1],
                                place.Point.coordinates[0]);
            marker = new GMarker(point);
            map.setCenter(point, 13);
            map.addOverlay(marker);
            document.getElementById('address').innerHTML = place.address;
        }
    }
    
    function initialize() 
    {
        map = new GMap2(document.getElementById("map_image"));
        map.setCenter(new GLatLng(34, 0), 1);
        map.setUIToDefault();
        geocoder = new GClientGeocoder();
        if (navigator.geolocation) 
        {
            navigator.geolocation.getCurrentPosition(function(position) 
            {  
                document.getElementById('latitude').innerHTML = position.coords.latitude;
                document.getElementById('longitude').innerHTML = position.coords.longitude;
                var coord = position.coords.latitude+","+position.coords.longitude;
                geocoder.getLocations(coord, addAddressToMap);
            }); 
        } 
    }