public function isShowing($in_tag)
    {
        $container = $this->show_area;
        $containee = $in_tag;
        $ret = false;
        $match = "/^" . $containee . "/";
        if (preg_match($match, $container)) {
            $ret = true;
        }

        $match = "/qcol....form$/";
        if (!$ret && preg_match($match, $containee)) {
            $ret = true;
        }

        $match = "/pghd....form$/";
        if (!$ret && preg_match($match, $containee)) {
            $ret = true;
        }

        $match = "/pgft....form$/";
        if (!$ret && preg_match($match, $containee)) {
            $ret = true;
        }

        $match = "/grph...._/";
        if (!$ret && preg_match($match, $containee)) {
            $ret = true;
        }

        return $ret;
    }