Clear Authenication cache and smart card pin cache

For the longest time I have been trying to figure out how to clear the authentication cahce on https pages to force users to repick their smart card certificate along with their pin number.  I have since figureed out the first part in clearing the Authentication cache using some javascript code on page load.

function Clear() {
   document.execCommand("ClearAuthenticationCache");
 }

This works well and makes them pick thier certificate agian, but what it does not make the do is put back in the pin unless the cache timer has expired, then it does.  But if it has not expired they only pick certificate, how can I force them to do both on a web application, not a forms application.