I have 2 files, 1 for the PHP(html) and 1 for the JS code. I want to confirm any change on my SELECT...

PHP:

<select id="transfer_option" onchange="transfer_select()">
foreach (get_users() as $user){
       <option>$user['email']</option>
}
</select>

and on my JS file :

transfer_select() {
      if(confirm('Are you sure ?')){
            *ajax code, not important*
      }
}

But when I change the option and cancel, the option change anyway...