if (mForm) { mForm->RemoveElement(this); mForm = nsnull; }
SetForm(nsnull);
nsHTMLSelectElement::~nsHTMLSelectElement(){  // Null out form's pointer to us - no ref counting here!  if (mForm) {    mForm->RemoveElement(this);    mForm = nsnull;  }  if (nsnull != mOptions) {    mOptions->Clear();    mOptions->DropReference();    NS_RELEASE(mOptions);  }}