I want to call Google Plus callback function when clicking on the Google Plus button

I have used a Google Plus button in my project [built in CodeIgniter]. Here I have added the following code.

<span id="signinButton">
  <span
    class="g-signin gooConnect"
    data-callback="signinCallback"
    data-clientid="my_project_client_id"
    data-cookiepolicy="single_host_origin"
    data-requestvisibleactions="http://schemas.google.com/AddActivity"
    data-scope="https://www.googleapis.com/auth/userinfo.email">
  </span>
</span>

Then I added the Javascript code provided by Google.

<script type="text/javascript">
  (function() {
    var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
    po.src = 'https://apis.google.com/js/client:plusone.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
  })();

  function signinCallback(authResult) {
    if (authResult['access_token']) {
      $.ajax({
        url:base_url+'index.php/user/getUserProfile',
        type:'POST',
        data:{'access':authResult['access_token']},
        beforeSend  : function(){
          $("#loadingImageBeforeResult").show('slow');
        },
        success : function(resp){
          $("#loadingImageBeforeResult").hide('slow');
          if( resp == 'exist' ){
            window.location.href=base_url+'index.php/user/my_deals';
          } else {
            $('#link_for_geniepage').trigger('click');
          }
        },
        error : function(resp){}
      });
    } else if (authResult['error']) {
      // There was an error.
      // Possible error codes:
      //   "access_denied" - User denied access to your app
      //   "immediate_failed" - Could not automatially log in the user
      // console.log('There was an error: ' + authResult['error']);
    }
  }
</script> 

It's working fine for me, but if I log in my Gmail account in a separate tab and then I go to my login page, the callback f