MarcTV Quicktags

<?php
/*
  Plugin Name: MarcTV Quicktags
  Plugin URI: http://www.marctv.de/blog/2010/08/25/marctv-wordpress-plugins/
  Description: Displays a bold, italic, add link and quote button on top of the comment form
  Version: 1.8
  Author: Marc Tönsing
  Author URI: http://www.marctv.de
  Stable tag: 1.8
  License: GPL2
 */

function add_quicktag_scripts() {
    if ( comments_open() && is_singular() ) {
        wp_enqueue_script("marctv_quicktags", plugin_dir_url(__FILE__) . "marctv_quicktags.js", array("quicktags","jquery"), "1.8", 1);
        wp_enqueue_style("marctv_quicktags", plugin_dir_url(__FILE__) . "marctv_quicktags.css", false, "1.8");
        wp_print_styles('editor-buttons');
    }
}

if ( !is_admin() ) {
  add_action('wp_print_styles', 'add_quicktag_scripts');
}