Execute function after window replace

I send request with angular.js with $http and got some response and after that i must update page and call timer function:

$http({method: 'POST', url: url_api, data: {login_username: username, login_password: password}}).success(function(data, status, headers, config) {
 // parse data
 ....
 window.location.replace("/");
 // call timer
 timer();
}

Where timer:

function timer(){
  document.getElementById("span_count_down").innerHTML = 'Time is out!';
  return;
}

But when i update page, i don't see Time is out! in innerHTML, i see previous innerHTML.

Thank you.