PR_FALSE, PR_TRUE, nsnull);
PR_FALSE, PR_TRUE, PR_TRUE, nsnull);
nsHTMLSelectElement::SetOptionSelected(nsIDOMHTMLOptionElement* anOption,                                       PRBool aIsSelected){  PRInt32 index;  nsresult rv = GetOptionIndex(anOption, &index);  if (NS_FAILED(rv)) {    return rv;  }  return SetOptionsSelectedByIndex(index, index, aIsSelected,                                   PR_FALSE, PR_TRUE, nsnull);}