custom module js loaded before the module which it depends, Drupal.behaviors The "Drupal.behaviors" doesn't behave as "document.ready", if I use a document.ready I will have the correct map but if I do a Drupal.behaviors, there will be an error related to the openlayers library function which is not found :(

After check, the OpenLayers.js is loaded after my module js.
Is it possible to make it load after another one ?
I though adding a dependency on another module would make him load before the other one.

If I use a setTimeout it's working but it's not the best solution !

Do you have any idea how I can do that ? 

Thank you guys

(function ($) {
Drupal.OL_lat_long = Drupal.OL_lat_long || {};
    Drupal.behaviors.OL_lat_long = {
         attach: function (context, settings) {
                setTimeout(function(){
                    var map = $('#openlayers-map').data('openlayers').openlayers;
                    var pointLayer= map.layers[1];
                    console.log(pointLayer);
                    proj4326 = new OpenLayers.Projection("EPSG:4326");
                    proj900913 = new OpenLayers.Projection("EPSG:900913");
                    Drupal.OL_lat_long.dragPoint();
                    Drupal.OL_lat_long.actualizeLatLong();
                    Drupal.OL_lat_long.clickMap();
                    $('#redrawPoint').click(function(){
                        Drupal.OL_lat_long.redrawPointOnMap();
                        Drupal.OL_lat_long.actualizeLatLong();

                    });
            },200);
        //  });
        }
    }
}(jQuery));
Maybe you could try altering the weight of the script you add in your module?

drupal_add_js(drupal_get_path('module', 'MYMODULE') .'/myscript.js', array(
    'weight' =&gt; '999',
  )
);