--- common.inc	2007-02-06 01:01:38.000000000 -0600
+++ common.inc.new	2007-02-06 01:01:19.000000000 -0600
@@ -1379,6 +1379,7 @@
  * Add a <link> tag to the page's HEAD.
  */
 function drupal_add_link($attributes) {
+  module_invoke_all('side_effect', __FUNCTION__, func_get_args());
   drupal_set_html_head('<link'. drupal_attributes($attributes) ." />\n");
 }
 
@@ -1425,6 +1426,7 @@
   // Create an array of CSS files for each media type first, since each type needs to be served
   // to the browser differently.
   if (isset($path)) {
+  	  module_invoke_all('side_effect', __FUNCTION__, func_get_args());
     // This check is necessary to ensure proper cascading of styles and is faster than an asort().
     if (!isset($css[$media])) {
       $css[$media] = array('module' => array(), 'theme' => array());
@@ -1604,6 +1606,7 @@
  *   far for $scope is returned.
  */
 function drupal_add_js($data = NULL, $type = 'module', $scope = 'header', $defer = FALSE, $cache = TRUE) {
+  module_invoke_all('side_effect', __FUNCTION__, func_get_args());
   if (!is_null($data)) {
     _drupal_add_js('misc/jquery.js', 'core', 'header', FALSE, $cache);
     _drupal_add_js('misc/drupal.js', 'core', 'header', FALSE, $cache);