if (aType) { *aType = mType; return NS_OK; } else { return NS_FORM_NOTOK; }
aType.SetString("button"); return NS_OK;
nsHTMLButtonElement::GetType(PRInt32* aType){  if (aType) {    *aType = mType;    return NS_OK;  } else {    return NS_FORM_NOTOK;  }}