Create a short code that inserts js

by

Put the script into an external file, set the selector there and enqueue it from your shortcode:

if(! function_exists ('aisis_toc') )
{
    function aisis_toc() 
    {
        if ( ! is_singular() )
            return;

        wp_enqueue_script(
        'jquery-toc',
        plugins_url( 'js/jquery-toc.js', __FILE__ ),
        array ( 'jquery' ),
        NULL,
        TRUE);

        return;
    }
}