content->GetTag(*getter_AddRefs(tag));
content->GetTag(getter_AddRefs(tag));
nsHTMLTableElement::GetTFoot(nsIDOMHTMLTableSectionElement** aValue){  *aValue = nsnull;  nsCOMPtr<nsIDOMNode> child;  GetFirstChild(getter_AddRefs(child));  while (child) {    nsCOMPtr<nsIDOMHTMLTableSectionElement> section(do_QueryInterface(child));    if (section) {      nsCOMPtr<nsIAtom> tag;      nsCOMPtr<nsIContent> content = do_QueryInterface(section);      content->GetTag(*getter_AddRefs(tag));      if (tag.get() == nsHTMLAtoms::tfoot) {        *aValue = section;        NS_ADDREF(*aValue);        break;      }    }    nsIDOMNode *temp = child.get();    temp->GetNextSibling(getter_AddRefs(child));  }  return NS_OK;}