nsresult result=aSink->OpenForm(*aNode); return result;
return aSink->OpenContainer(*aNode);
  virtual nsresult  OpenContainer(nsIParserNode *aNode,eHTMLTags aTag,nsDTDContext *aContext,nsIHTMLContentSink *aSink) {    nsresult result=aSink->OpenForm(*aNode);    return result;  }