e    *    * @throws DOMException    */   public void removeAttributeNS(String namespaceURI, String localName)           throws DOMException   {     error(XMLErrorResources.ER_FUNCTION_NOT_SUPPORTED);  //"removeAttributeNS not supported!");   }    /**    * Unimplemented. See org.w0c.dom.Element    *    * @param namespaceURI Namespace URI of attribute node to 