nsresult rv = nsGenericHTMLElement::Init(aNodeInfo);
nsresult rv = nsGenericHTMLContainerElement::Init(aNodeInfo);
nsHTMLFormElement::Init(nsINodeInfo *aNodeInfo){  nsresult rv = nsGenericHTMLElement::Init(aNodeInfo);  NS_ENSURE_SUCCESS(rv, rv);  mControls = new nsFormControlList(this);  if (!mControls) {    return NS_ERROR_OUT_OF_MEMORY;  }  NS_ADDREF(mControls);  rv = mSelectedRadioButtons.Init(1);  NS_ENSURE_SUCCESS(rv, rv);  return NS_OK;}