gps-to-server.js

//To get the GPS coordinate from the mobile browser:

navigator.geolocation.getCurrentPosition(function(location) {
  // location.coords.longitude;
  // location.coords.latitude;
});

//To let the server receive data, you'll need to create a service that will handle your json data.
//e.g. in node.js/express

app.put('api/location', function(req, res) {
  // req.body.location;
  // save coordinates to db/datastore
});

// Now that you have a RESTful service that handles data, you can now try to push data to the server every once in a while.

function updatePosition(location) {
  var data = { x: location.coords.longitude, y: location.coords.latitude };
  $.ajax({type: 'put', url: '/api/location',  data: data, success: updateServer });
}
function updateServer() {
  setTimeout(function() {
    navigator.geolocation.getCurrentPosition(updatePosition);
  }, 1000);
}
updateServer();