$('#tracker').detach().prependTo($('#sidebar')).removeClass('hidden');
$('#tracker_button').on('click', function() { start_tracking($('#tracker_username').val()) });
$('#tracker_stop').on('click', stop_tracking);
+ $('#track_user').removeClass('hidden');
+ $('#track_user').on('click', function() { stop_tracking(); start_tracking($(this).data('user')) });
if(localStorage.getItem('tracker_username'))
start_tracking(localStorage.getItem('tracker_username'));