Add Geolocation Tracking Code in HTML 5

Here is the code:

/*
* Track and report the current location
*/

var handlePositionUpdate = function(e) {
var latitude = e.coords.latitude;
var longitude = e.coords.longitude;
log("Position update:", latitude, longitude);
if(navigator.onLine) {
uploadLocations(latitude, longitude);
}
storeLocation(latitude, longitude);
}
var handlePositionError = function(e) {
log("Position error");
}
var uploadLocations = function(latitude, longitude) {
var request = new XMLHttpRequest();
request.open("POST", "http://geodata.example.net:8000/geoupload", true);
request.send(localStorage.locations);
}
var geolocationConfig = {"maximumAge":20000};
navigator.geolocation.watchPosition(handlePositionUpdate,
handlePositionError,
geolocationConfig);