WordPress增加通用短代码下拉按钮

add_action('media_buttons','add_sc_select',11);
function add_sc_select() {
    echo ' <select id="sc_select">
                            <option>短代码</option>
                            <option value="[html][/html]">[html]</option>
                            <option value="[css][/css]">[css[</option>
                            <option value="[javascript][/javascript]">[javascript]</option>
            </select>';
}

add_action('admin_head', 'button_js');
function button_js() {
    echo '<script type="text/javascript">
        jQuery(document).ready(function(){
           jQuery("#sc_select").change(function() {
                  send_to_editor(jQuery("#sc_select :selected").val());
                      return false;
            });
        });
        </script>';
}