virtual nsresult SetAttr(nsINodeInfo *aNodeInfo, const nsAString& aValue,
virtual nsresult SetAttr(PRInt32 aNameSpaceID, nsIAtom* aAttribute, nsIAtom* aPrefix, const nsAString& aValue,
  virtual nsresult SetAttr(nsINodeInfo *aNodeInfo, const nsAString& aValue,                           PRBool aNotify) {  return NS_OK; }