NS_IMETHOD    CreateElementNS(const nsString& aNamespaceURI, const nsString& aQualifiedName, nsIDOMElement** aReturn) {
NS_IMETHOD    CreateElementNS(const nsAReadableString& aNamespaceURI, const nsAReadableString& aQualifiedName, nsIDOMElement** aReturn) {
  NS_IMETHOD    CreateElementNS(const nsString& aNamespaceURI, const nsString& aQualifiedName, nsIDOMElement** aReturn) {    return NS_OK;  }