setFocus(nsnull,0); setAnchor(nsnull,0);
nsRangeList::Clear(){  if (!mRangeArray)    return NS_ERROR_FAILURE;  for (PRUint32 i = 0; i < mRangeArray->Count();i++)  {    mRangeArray->RemoveElementAt(i);    // Does RemoveElementAt also delete the elements?  }  return NS_OK;}