NS_IMETHOD ContentStatesChanged(nsIDocument* aDocument, nsIContent* aContent1, nsIContent* aContent2, PRInt32 aStateMask) { return NS_OK; }
nsDocument::ContentStatesChanged(nsIContent* aContent1, nsIContent* aContent2) { PRInt32 i;   for (i = 0; i < mObservers.Count(); i++) { nsIDocumentObserver*  observer = (nsIDocumentObserver*)mObservers[i]; observer->ContentStatesChanged(this, aContent1, aContent2);   if (observer != (nsIDocumentObserver*)mObservers[i]) { i--; } } return NS_OK; }
  NS_IMETHOD ContentStatesChanged(nsIDocument* aDocument,                                  nsIContent* aContent1,                                  nsIContent* aContent2,                                  PRInt32 aStateMask) { return NS_OK; }