NS_IMETHOD GetAttr(PRInt32 aNameSpaceID, nsIAtom *aAttribute, nsAString& aResult) const {return NS_CONTENT_ATTR_NOT_THERE; }
NS_IMETHOD GetAttr(PRInt32 aNameSpaceID, nsIAtom *aAttribute, nsIAtom*& aPrefix, nsAString& aResult) const {return NS_CONTENT_ATTR_NOT_THERE; }
  NS_IMETHOD GetAttr(PRInt32 aNameSpaceID, nsIAtom *aAttribute, nsAString& aResult) const {return NS_CONTENT_ATTR_NOT_THERE; }