CJAX Vote System Problem with multiple clicks

[eluser]bubx[/eluser]
I did so at the beginning, but for me it was not satisfying. I did this using the session.

Code:

$data = $this->session->userdata($id);
if($data==false){
  [...]
  $this->session->set_userdata($id,true);
  }else{
   [...]
  }