return SetOptionSelectedByIndex(index, aIsSelected);
return SetOptionsSelectedByIndex(index, index, aIsSelected, PR_FALSE, PR_TRUE, nsnull);
nsHTMLSelectElement::SetOptionSelected(nsIDOMHTMLOptionElement* anOption,                                       PRBool aIsSelected){  PRUint32 index = 0;  if (NS_FAILED(GetOptionIndex(anOption, &index))) {    return NS_ERROR_FAILURE;  }  return SetOptionSelectedByIndex(index, aIsSelected);}