html dom dom DeepNodeListImpl dom ElementImpl dom NodeImpl w3c dom Node w3c dom NodeList namenodelistimpl deepnodelistimpl nodelist namenodelistimpl nodeimpl rootnode tagname rootnode tagname node nextmatchingelementafter node node current.haschildnodes current.getfirstchild rootnode current.getnextsibling rootnode current.getparentnode current.getnextsibling rootnode current.getnodetype node.element_node name elementimpl name.equals name.equals tagname