How to redirect two users at the same time AJAX XML?

I have two logged in users, with "id" and "id2". Both users are on index page, but there are also other users.

If one of the users click the button, he and the other user (with id2) to be redirected to another page. How am I supposed to redirect only these two users at the same time.

function redirect() {
     //redirect only user with id and id2
}