mDocumentColorRule = new HTMLDocumentColorRule(this); NS_ADDREF(mDocumentColorRule);
HTMLStyleSheetImpl::HTMLStyleSheetImpl(void)  : nsIHTMLStyleSheet(),    mURL(nsnull),    mDocument(nsnull),    mLinkRule(nsnull),    mVisitedRule(nsnull),    mActiveRule(nsnull),    mDocumentColorRule(nsnull){  NS_INIT_REFCNT();  mTableTHRule = new TableTHRule(this);  NS_ADDREF(mTableTHRule);}