How to add custom javascript to WordPress Admin?

Use the admin_enqueue_scripts action and the wp_enqueue_script method to add custom scripts to the admin interface.

This assumes that you have myscript.js in your plugin folder. Change accordingly. The my_custom_script handle should be unique for your module and script.

function my_enqueue($hook) {    // Only add to the edit.php admin page.    // See WP docs.    if ('edit.php' !== $hook) {        return;    }    wp_enqueue_script('my_custom_script', plugin_dir_url(__FILE__) . '/myscript.js');}add_action('admin_enqueue_scripts', 'my_enqueue');

There is a snippet for Your functions.php file :

function custom_admin_js() {    $url = get_bloginfo('template_directory') . '/js/wp-admin.js';    echo '"<script type="text/javascript" src="'. $url . '"></script>"';}add_action('admin_footer', 'custom_admin_js');

Works fine on Wordpress 3.2.1.

<?phpfunction add_jquery_data() {    global $parent_file;    if ( isset( $_GET['action'] ) && $_GET['action'] == 'edit' && isset( $_GET['post'] ) && $parent_file == 'edit.php') {    // Do some stuff.    }}add_filter('admin_head', 'add_jquery_data');?>