Hi all, i still have some problems with javascript closures, and input/output variables.

Im playing with google maps api for a no profit project: users will place the marker into a gmap, and I have to save the locality (with coordinates) in my db.

The problem comes when i need to do a second geocode in order to get a unique pairs of lat and lng for a location: lets say two users place the marker in the same town but in different places, I dont want to have the same locality twice in the database with differents coords.

I know i can do the second geocode after the user select the locality, but i want to understand what am i mistaking here:

// First geocoding, take the marker coords to get locality.
geocoder.geocode(
  {
    'latLng': new google.maps.LatLng($("#lat").val(), $("#lng").val()),
    'language': 'it'
  },
  function(results_1, status_1){
    // initialize the html var inside this closure
    var html = '';
    if(status_1 == google.maps.GeocoderStatus.OK)
    {
      // do stuff here
      for(i = 0, geolen = results_1[0].address_components.length; i != geolen)
      {
        // Second type of geocoding: for each location from the first geocoding,
        // i want to have a unique [lat,lan]
        geocoder.geocode(
          {
            'address': results_1[0].address_components[i].long_name
          },
          function(results_2, status_2){
            // Here come the problem. I need to have the long_name here, and
            // 'html' var should increment.
            coords = results_2[0].geometry.location.toUrlValue();
            html += 'some html to let the user choose the locality';
          }
        );
      }
      // Finally, insert the 'html' variable value into my dom... 
      //but it never gets updated!
    }
    else
    {
      alert("Error from google geocoder:" + status_1)
    }
  }
);

I tryed with:

  // Second type of geocoding: for each location from the first geocoding, i want
  // to have a unique [lat,lan]
  geocoder.geocode(
    {
      'address': results_1[0].address_components[i].long_name
    },
    (function(results_2, status_2, long_name){
      // But in this way i'll never get results_2 or status_2, well, results_2 
      // get long_name value, status_2 and long_name is undefined.
      // However, html var is correctly updated.
      coords = results_2[0].geometry.location.toUrlValue();
      html += 'some html to let the user choose the locality';
    })(results_1[0].address_components[i].long_name)
  );

And with:

  // Second type of geocoding: for each location from the first geocoding, i want to have
  // a unique [lat,lan]
  geocoder.geocode(
    {
      'address': results_1[0].address_components[i].long_name
    },
    (function(results_2, status_2, long_name){
      // But i get an obvious "results_2 is not defined" error (same for status_2).
      coords = results_2[0].geometry.location.toUrlValue();
      html += 'some html to let the user choose the locality, that can be more than one';
    })(results_2, status_2, results_1[0].address_components[i].long_name)
  );

Any suggestion?

EDIT:

My problem is how to pass an additional arguments to the geocoder inner function:

function(results_2, status_2, long_name){
    //[...]
}

becose if i do that with a clousure, I mess with the original parameters (results_2 and status_2)