/**
 * Implements hook_element_info_alter();
 */
function mymodule_element_info_alter(&$type) {
  foreach ($type['machine_name']['#process'] as $key => $process) {
    // Eltakaritjuk az eredeti form_machine_name processt, a sajatunkat fogjuk hasznalni
    if ($process == 'form_process_machine_name') {
      $type['machine_name']['#process'][$key]  = 'mymodule_process_machine_name';
    }
  }
}
 
/**
 * A custom machine_name element process function to change transliteration method js.
 */ 
function mymodule_process_machine_name ($element, &$form_state) {
  // Eloszor athajtjuk az eredeti form processen, nem kinyirni akartuk az eredeti process, csak belebabralni.
  $element = form_process_machine_name($element, &$form_state)
 
  foreach ($element['#attached']['js'] as $key => $js) {
    if ($js == 'misc/machine-name.js') {
      $element['#attached']['js'][$key]  = drupal_get_path('module', 'mymodule') . '/js/machine-name.js';
    }
  }
 
  return $element;
}