*aReturn = nsnull; return NS_OK;
return NS_ERROR_FAILURE;
nsFormControlList::Item(PRUint32 aIndex, nsIDOMNode** aReturn){  nsIFormControl *control = (nsIFormControl*)mElements.ElementAt(aIndex);  if (control) {    return control->QueryInterface(kIDOMNodeIID, (void**)aReturn); // keep the ref  }  *aReturn = nsnull;  return NS_OK;}