1. <a target="_blank" href="http://www.facebook.com/dialog/friends/?id=FRIEND_ID&app_id=APP_ID&redirect_uri=REDIRECT_URL">
  2. ADD AS FRIEND
  3. </a>
  4.  
  5. <script>
  6. FB.ui({
  7. method: 'friends.add',
  8. id: fbid
  9. }, function(param) {});
  10. </script>​​