diff --git a/session_security/middleware.py b/session_security/middleware.py
index e9b2a93..16a8b48 100644
--- a/session_security/middleware.py
+++ b/session_security/middleware.py
@@ -11,8 +11,10 @@
 
 from datetime import datetime, timedelta
 
+from django.contrib import messages
 from django.contrib.auth import logout
 from django.core.urlresolvers import reverse, resolve, Resolver404
+from django.views import defaults
 
 try:
     from django.utils.deprecation import MiddlewareMixin
@@ -62,7 +64,11 @@ def process_request(self, request):
         delta = now - get_last_activity(request.session)
         expire_seconds = self.get_expire_seconds(request)
         if delta >= timedelta(seconds=expire_seconds):
+            request._messages._queued_messages = []
+            messages.info(request, 'Your session has expired (%s). Please login again.' % delta)
             logout(request)
+            if request.is_ajax():
+                return defaults.http.HttpResponseForbidden('403 Forbidden: %s' % msg, content_type='text/html')
         elif (request.path == reverse('session_security_ping') and
                 'idleFor' in request.GET):
             self.update_last_activity(request, now)
diff --git a/session_security/static/session_security/script.js b/session_security/static/session_security/script.js
index 48ab42c..e90c257 100644
--- a/session_security/static/session_security/script.js
+++ b/session_security/static/session_security/script.js
@@ -119,12 +119,15 @@ yourlabs.SessionSecurity.prototype = {
         this.apply();
     },
 
+    idleForSeconds: function() { return Math.floor((new Date() - this.lastActivity) / 1000); },
+    isExpired: function() { return this.idleForSeconds >= this.expireAfter; },
+
     // Apply warning or expiry, setup next ping
     apply: function() {
         // Cancel timeout if any, since we're going to make our own
         clearTimeout(this.timeout);
 
-        var idleFor = Math.floor((new Date() - this.lastActivity) / 1000);
+        var idleFor = this.idleForSeconds();
 
         if (idleFor >= this.expireAfter) {
             return this.expire();