Wordpress Custom Taxonomy Fixed Ttitle

function CustomTitle()
    {
    global $paged;
    $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
    if (is_front_page() or is_single())
        {
        $custom_title = wp_title('');
        return $custom_title;
        }
      else
        {
            {
            if ($paged == '1' or $paged == '0')
                {
                $custom_title = wp_title('');
                $custom_title.= ' - Domainname';
                return $custom_title;
                }
              else
                {
                $custom_title = wp_title('');
                $custom_title.= ' - Pagina ' . $paged . ' - Domainname';
                return $custom_title;
            }
        }

    }
    }


    echo CustomTitle();