impl xs opti w3c dom Attr w3c dom DOMException w3c dom NamedNodeMap w3c dom Node namednodemapimpl namednodemap attr attrs namednodemapimpl attr attrs this.attrs attrs node getnameditem name attrs.length attrs name attrs node item index index index getlength attrs index getlength attrs.length node getnameditemns namespaceuri localname attrs.length attrs localname attrs getnamespaceuri namespaceuri attrs node setnameditemns node arg domexception domexception domexception.not_supported_err node setnameditem node arg domexception domexception domexception.not_supported_err node removenameditem name domexception domexception domexception.not_supported_err node removenameditemns namespaceuri localname domexception domexception domexception.not_supported_err