In your theme’s functions.php file, or the like:
add_action( 'your-custom-action', 'wpse8170_media_popup_init' );
In the page template used for the page in question:
do_action( 'your-custom-action' );
In your theme’s functions.php file, or the like:
add_action( 'your-custom-action', 'wpse8170_media_popup_init' );
In the page template used for the page in question:
do_action( 'your-custom-action' );