NS_IMETHODIMP nsHTMLSelectListAccessible::GetAccNextSibling(nsIAccessible **_retval) {
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetAccNextSibling(nsIAccessible **_retval) {
NS_IMETHODIMP nsHTMLSelectListAccessible::GetAccNextSibling(nsIAccessible **_retval){  *_retval = nsnull;  return NS_OK;}