Diff from RB for issue 617

issue_617-1.diff

diff --git a/app/views/main/login.html.erb b/app/views/main/login.html.erb
--- a/app/views/main/login.html.erb
+++ b/app/views/main/login.html.erb
@@ -29,9 +29,12 @@
   </div>
 </div>
 
+
+<%# Warn Internet Explorer users %>
 <%# Try to put focus on the login text field on load %>
 <script type="text/javascript">
 //<![CDATA[
+  if (Prototype.Browser.IE) { alert("<%=I18n.t('warn_explorer_users')%>"); }
   try{ document.getElementById('user_login').focus(); } catch(e) {}
 //]]>
 </script>
diff --git a/config/locales/en.yml b/config/locales/en.yml
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -22,6 +22,7 @@ en:
     username_and_password_not_blank: "Your username and password must not be blank."
     session_expired:     "Your session has expired. Please log in"
     please_log_in:       "Please log in"
+    warn_explorer_users: "It appears that you are using Internet Explorer. Please note that MarkUs may lack some functionality with your browser, we recomend you switch to Mozilla Firefox."
 
     # app/views/layouts/_header.html.erb
     log_out:            "Log out"
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -22,6 +22,7 @@ fr:
     username_and_password_not_blank: "Veuillez entrer vos nom d'utilisateur et mot de passe."
     session_expired:     "Votre session a expiré. Merci de vous reconnecter."
     please_log_in:       "Merci de vous connecter."
+    warn_explorer_users: "Il semble que vous utilisez l'Internet Explorer. Noter que MarkUs peuvent manquer certaines fonctionnalités de votre navigateur, nous vous recommandons passer à Mozilla Firefox."
 
     # app/views/layouts/_header.html.erb
     log_out:            "Déconnexion"