printXMLTree(fout, mode, indent, lexer, content);
            }
        }
        else if (node.type == Node.DOCTYPE_TAG)
        {
            printDocType(fout, indent, lexer, node);
        }
        else if (node.type == Node.PROC_INS_TAG)
        {
            printPI(fout, indent, node);
        }
        else if (node.type == Node.XML_DECL)
        {
            printXmlDecl(fout, indent, node);
        }
        else if (node.type == Node.CDATA_TAG)
        {
            printCDATA(fout, indent, node);
        }
        else if (node.type == Node.SECTION_TAG)
        {
            printSection(fout, indent, node);
        }
        else if (node.type == Node.ASP_TAG)
        {
            printAsp(fout, indent, node);
        }
        else if (node.type == Node.JSTE_TAG)
        {
            printJste(fout, indent, node);
        }
        else if (node.type == Node.PHP_TAG)
        {
            printPhp(fout, indent, node);
        }
        else if (TidyUtils.toBoolean(node.tag.model & Dict.CM_EMPTY)
            || node.type == Node.START_END_TAG

    public org.w3c.dom.Node replaceChild(org.w3c.dom.Node newChild, org.w3c.dom.Node oldChild)
    {
        // TODO - handle newChild already in tree

        if (newChild == null)
        {
            return null;
        }
        if (!(newChild instanceof DOMNodeImpl))
        {
            throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, "newChild not instanceof DOMNodeImpl");
        }
        DOMNodeImpl newCh = (DOMNodeImpl) newChild;

        if (this.adaptee.type == Node.ROOT_NODE)
        {
            if (newCh.adaptee.type != Node.DOCTYPE_TAG && newCh.adaptee.type != Node.PROC_INS_TAG)
            {
                throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, "newChild cannot be a child of this node");
            }
        }
        else if (this.adaptee.type == Node.START_TAG)
        {
            if (newCh.adaptee.type != Node.START_TAG
                && newCh.adaptee.type != Node.START_END_TAG
                && newCh.adaptee.type != Node.COMMENT_TAG
                && newCh.adaptee.type != Node.TEXT_NODE
                && newCh.adaptee.type != Node.CDATA_TAG)
            {
                throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, "newChild cannot be a child of this node");
            }
        }
        if (oldChild == null)

    public org.w3c.dom.Node appendChild(org.w3c.dom.Node newChild)
    {
        // TODO - handle newChild already in tree

        if (newChild == null)
        {
            return null;
        }
        if (!(newChild instanceof DOMNodeImpl))
        {
            throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, "newChild not instanceof DOMNodeImpl");
        }
        DOMNodeImpl newCh = (DOMNodeImpl) newChild;

        if (this.adaptee.type == Node.ROOT_NODE)
        {
            if (newCh.adaptee.type != Node.DOCTYPE_TAG && newCh.adaptee.type != Node.PROC_INS_TAG)
            {
                throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, "newChild cannot be a child of this node");
            }
        }
        else if (this.adaptee.type == Node.START_TAG)
        {
            if (newCh.adaptee.type != Node.START_TAG
                && newCh.adaptee.type != Node.START_END_TAG
                && newCh.adaptee.type != Node.COMMENT_TAG
                && newCh.adaptee.type != Node.TEXT_NODE
                && newCh.adaptee.type != Node.CDATA_TAG)
            {
                throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, "newChild cannot be a child of this node");
            }
        }

    public static class ParseOptGroup implements Parser
    {

        /**
         * @see org.w3c.tidy.Parser#parse(org.w3c.tidy.Lexer, org.w3c.tidy.Node, short)
         */
        public void parse(Lexer lexer, Node field, short mode)
        {
            Node node;
            TagTable tt = lexer.configuration.tt;

            lexer.insert = -1; // defer implicit inline start tags

            while ((node = lexer.getToken(Lexer.IGNORE_WHITESPACE)) != null)
            {
                if (node.tag == field.tag && node.type == Node.END_TAG)
                {
                    field.closed = true;
                    Node.trimSpaces(lexer, field);
                    return;
                }

                // deal with comments etc.
                if (Node.insertMisc(field, node))
                {
                    continue;
                }

                if (node.type == Node.START_TAG && (node.tag == tt.tagOption || node.tag == tt.tagOptgroup))

        condFlushLine(fout, indent);

        addC('<', linelen++);

        addC(TidyUtils.foldCase('h', this.configuration.upperCaseTags, this.configuration.xmlTags), linelen++);
        addC(TidyUtils.foldCase('r', this.configuration.upperCaseTags, this.configuration.xmlTags), linelen++);

        if (this.configuration.xmlOut)
        {
            printString(" />");
        }
        else
        {
            addC('>', linelen++);
        }

        if (this.configuration.indentContent)
        {
            condFlushLine(fout, indent);
        }