code: public Attr getAttributeNodeNS(String namespaceURI, String localName)
    {
  
      error(XMLErrorResources.ER_FUNCTION_NOT_SUPPORTED);  //"getAttributeNodeNS not supported!");
  
      return null;
    }
docs: Unimplemented. See org.w3c.dom.Element
  
  @param namespaceURI Namespace URI of attribute node to get
  @param localName Local part of qualified name of attribute node to get
  
  @return null