diff --git a/README.rst b/README.rst
index 2058cc3..d67a3e0 100644
--- a/README.rst
+++ b/README.rst
@@ -219,6 +219,30 @@ Template settings
 
   if you omit some keys of the dictionnary, the default value for these keys is used.
 
+* ``CAS_INFO_MESSAGES``: Messages displayed in info-boxes on the html pages of the default templates.
+  It is a dictionnary mapping message name to a message dict. A message dict has 3 keys:
+
+  * ``message``: A unicode message to display, potentially wrapped around ugettex_lazy
+  * ``discardable``: A boolean, specify if the users can close the message info-box
+  * ``type``: One of info, success, info, warning, danger. The type of the info-box.
+
+  ``CAS_INFO_MESSAGES`` contains by default one message, ``cas_explained``, which explain
+  roughly the purpose of a CAS. The default is::
+
+    {
+        "cas_explained": {
+            "message":_(
+                u"The Central Authentication Service grants you access to most of our websites by "
+                u"authenticating only once, so you don't need to type your credentials again unless "
+                u"your session expires or you logout."
+            ),
+            "discardable": True,
+            "type": "info",  # one of info, success, info, warning, danger
+        },
+    }
+
+* ``CAS_INFO_MESSAGES_ORDER``: A list of message names. Order in which info-box messages are
+  displayed. Use an empty list to disable messages display. The default is ``[]``.
 * ``CAS_LOGIN_TEMPLATE``: Path to the template showed on ``/login`` then the user
   is not autenticated.  The default is ``"cas_server/login.html"``.
 * ``CAS_WARN_TEMPLATE``: Path to the template showed on ``/login?service=...`` then
diff --git a/cas_server/default_settings.py b/cas_server/default_settings.py
index 0ee1749..238fc0a 100644
--- a/cas_server/default_settings.py
+++ b/cas_server/default_settings.py
@@ -12,6 +12,7 @@
 """Default values for the app's settings"""
 from django.conf import settings
 from django.contrib.staticfiles.templatetags.staticfiles import static
+from django.utils.translation import ugettext_lazy as _
 
 from importlib import import_module
 
@@ -180,6 +181,32 @@ CAS_NEW_VERSION_EMAIL_WARNING = True
 #: You should not change it.
 CAS_NEW_VERSION_JSON_URL = "https://pypi.python.org/pypi/django-cas-server/json"
 
+
+#: Messages displayed in a info-box on the html pages of the default templates.
+#: ``CAS_INFO_MESSAGES`` is a :class:`dict` mapping message name to a message :class:`dict`.
+#: A message :class:`dict` has 3 keys:
+#:  * ``message``: A :class:`unicode`, the message to display, potentially wrapped around
+#:    ugettex_lazy
+#:  * ``discardable``: A :class:`bool`, specify if the users can close the message info-box
+#:  * ``type``: One of info, success, info, warning, danger. The type of the info-box.
+#: ``CAS_INFO_MESSAGES`` contains by default one message, ``cas_explained``, which explain
+#: roughly the purpose of a CAS.
+CAS_INFO_MESSAGES = {
+    "cas_explained": {
+        "message": _(
+            u"The Central Authentication Service grants you access to most of our websites by "
+            u"authenticating only once, so you don't need to type your credentials again unless "
+            u"your session expires or you logout."
+        ),
+        "discardable": True,
+        "type": "info",  # one of info, success, info, warning, danger
+    },
+}
+#: :class:`list` of message names. Order in which info-box messages are displayed.
+#: Let the list empty to disable messages display.
+CAS_INFO_MESSAGES_ORDER = []
+
+
 GLOBALS = globals().copy()
 for name, default_value in GLOBALS.items():
     # only care about parameter begining by CAS_
diff --git a/cas_server/locale/fr/LC_MESSAGES/django.po b/cas_server/locale/fr/LC_MESSAGES/django.po
index 644f814..049921a 100644
--- a/cas_server/locale/fr/LC_MESSAGES/django.po
+++ b/cas_server/locale/fr/LC_MESSAGES/django.po
@@ -23,7 +23,18 @@ msgstr ""
 msgid "Central Authentication Service"
 msgstr "Service Central d'Authentification"
 
-#: forms.py:88
+#: default_settings.py:197
+msgid ""
+"The Central Authentication Service grants you access to most of our websites "
+"by authenticating only once, so you don't need to type your credentials "
+"again unless your session expires or you logout."
+msgstr ""
+"Le Service Central d'Authentification permet, en vous authentifiant une "
+"seule fois, d'accéder à la plupart de nos sites sans avoir à retaper votre "
+"identifiant et votre mot de passe chaque fois que vous changez de site, "
+"jusqu'à ce que votre session expire ou que vous vous déconnectiez."
+
+#: forms.py:84
 msgid "Identity provider"
 msgstr "fournisseur d'identité"
 
diff --git a/cas_server/static/cas_server/functions.js b/cas_server/static/cas_server/functions.js
index 81a4add..8bbbeaa 100644
--- a/cas_server/static/cas_server/functions.js
+++ b/cas_server/static/cas_server/functions.js
@@ -31,14 +31,14 @@ function eraseCookie(name) {
     createCookie(name,"",-1);
 }
 
-function alert_version(last_version){
+function discard_and_remember(id, cookie_name, token, days=10*365){
     jQuery(function( $ ){
-        $("#alert-version").click(function( e ){
+        $(id).click(function( e ){
             e.preventDefault();
-            createCookie("cas-alert-version", last_version, 10*365);
+            createCookie(cookie_name, token, days);
         });
-        if(readCookie("cas-alert-version") === last_version){
-            $("#alert-version").parent().hide();
+        if(readCookie(cookie_name) === token){
+            $(id).parent().hide();
         }
     });
 }
diff --git a/cas_server/templates/cas_server/base.html b/cas_server/templates/cas_server/base.html
index 8a491ca..2a2d8e1 100644
--- a/cas_server/templates/cas_server/base.html
+++ b/cas_server/templates/cas_server/base.html
@@ -31,10 +31,16 @@
             <div class="col-lg-3 col-md-3 col-sm-2 col-xs-12"></div>
             <div class="col-lg-6 col-md-6 col-sm-8 col-xs-12">
             {% if auto_submit %}<noscript>{% endif %}
+            {% for msg in CAS_INFO_RENDER %}
+              <div class="alert alert-{{msg.type}}{% if msg.discardable %} alert-dismissable{% endif %}">
+                {% if msg.discardable %}<button type="button" class="close" data-dismiss="alert" aria-hidden="true" id="info-{{msg.name}}">&#215;</button>{% endif %}
+                <p>{{msg.message}}</p>
+              </div>
+            {% endfor %}
             {% if settings.CAS_NEW_VERSION_HTML_WARNING and upgrade_available %}
               <div class="alert alert-info alert-dismissable">
                 <button type="button" class="close" data-dismiss="alert" aria-hidden="true" id="alert-version">&#215;</button>
-                {% blocktrans %}A new version of the application is available. This instance runs {{VERSION}} and the last version is {{LAST_VERSION}}. Please consider upgrading.{% endblocktrans %}
+                <p>{% blocktrans %}A new version of the application is available. This instance runs {{VERSION}} and the last version is {{LAST_VERSION}}. Please consider upgrading.{% endblocktrans %}</p>
               </div>
             {% endif %}
             {% block ante_messages %}{% endblock %}
@@ -52,7 +58,7 @@
                         class="alert alert-danger"
                     {% endif %}
                 {% endspaceless %}>
-                    {{message|safe}}
+                    <p>{{message|safe}}</p>
                 </div>
             {% endfor %}
             {% if auto_submit %}</noscript>{% endif %}
@@ -71,9 +77,17 @@
       <script src="{{settings.CAS_COMPONENT_URLS.jquery}}"></script>
       <script src="{{settings.CAS_COMPONENT_URLS.bootstrap3_js}}"></script>
       <script src="{% static "cas_server/functions.js" %}"></script>
-      {% if settings.CAS_NEW_VERSION_HTML_WARNING and upgrade_available %}
-      <script type="text/javascript">alert_version("{{LAST_VERSION}}")</script>
-      {% endif %}
+      <script type="text/javascript">
+{% if settings.CAS_NEW_VERSION_HTML_WARNING and upgrade_available %}
+discard_and_remember("#alert-version", "cas-alert-version", "{{LAST_VERSION}}");
+{% endif %}
+{% for msg in CAS_INFO_RENDER %}
+{% if msg.discardable %}
+discard_and_remember("#info-{{msg.name}}", "cas-info-{{msg.name}}", "{{msg.hash}}");
+{% endif %}
+{% endfor %}
+{% block javascript_inline %}{% endblock %}
+</script>
       {% block javascript %}{% endblock %}
     </body>
 </html>
diff --git a/cas_server/templates/cas_server/login.html b/cas_server/templates/cas_server/login.html
index ff98c03..51aa19c 100644
--- a/cas_server/templates/cas_server/login.html
+++ b/cas_server/templates/cas_server/login.html
@@ -15,7 +15,7 @@
   {% if auto_submit %}</noscript>{% endif %}
 </form>
 {% endblock %}
-{% block javascript %}<script type="text/javascript">
+{% block javascript_inline %}
 jQuery(function( $ ){
     $("#id_warn").click(function(e){
         if($("#id_warn").is(':checked')){
@@ -26,5 +26,5 @@ jQuery(function( $ ){
     });
 });{% if auto_submit %}
 document.getElementById('login_form').submit(); // SUBMIT FORM{% endif %}
-</script>{% endblock %}
+{% endblock %}
 
diff --git a/cas_server/utils.py b/cas_server/utils.py
index 19957c8..17ec5f9 100644
--- a/cas_server/utils.py
+++ b/cas_server/utils.py
@@ -64,6 +64,7 @@ def context(params):
     """
     params["settings"] = settings
     params["message_levels"] = DEFAULT_MESSAGE_LEVELS
+
     if settings.CAS_NEW_VERSION_HTML_WARNING:
         LAST_VERSION = last_version()
         params["VERSION"] = VERSION
@@ -72,6 +73,28 @@ def context(params):
             params["upgrade_available"] = decode_version(VERSION) < decode_version(LAST_VERSION)
         else:
             params["upgrade_available"] = False
+
+    if settings.CAS_INFO_MESSAGES_ORDER:
+        params["CAS_INFO_RENDER"] = []
+        for msg_name in settings.CAS_INFO_MESSAGES_ORDER:
+            if msg_name in settings.CAS_INFO_MESSAGES:
+                try:
+                    msg = settings.CAS_INFO_MESSAGES[msg_name].copy()
+                except AttributeError:
+                    continue
+                if "message" in msg:
+                    msg["name"] = msg_name
+                    # use info as default infox type
+                    msg["type"] = msg.get("type", "info")
+                    # make box discardable by default
+                    msg["discardable"] = msg.get("discardable", True)
+                    msg_hash = (
+                        six.text_type(msg["message"]).encode("utf-8") +
+                        msg["type"].encode("utf-8")
+                    )
+                    # hash depend of the rendering language
+                    msg["hash"] = hashlib.md5(msg_hash).hexdigest()
+                    params["CAS_INFO_RENDER"].append(msg)
     return params