static function add_field()
 {
     check_admin_referer('fs_contact_options-options', 'fs_options');
     self::get_options();
     self::$form_options['fields'][] = FSCF_Util::$field_defaults;
     self::$new_field_added = __('A new field has been added. Now you must edit the field name and details, then click <b>Save Changes</b>.', 'si-contact-form');
     echo '<div id="message" class="updated fade"><p>' . self::$new_field_added . '</p></div>';
 }