How to add custom javascript on overlay Drupal 7

Drupal 7

Problem is our theme javascript is not working on overlay.
So we need include other js files into module.

Following are Steps
>>> create js file and place into module

>>> Add hook into your module
function modulename_overlay_child_initialize() {
  // Add our custom JavaScript.
  drupal_add_js(drupal_get_path('module', 'modulename') . '/overlay-child1.js');
}