diff --git a/lib/authenticated_system.rb b/lib/authenticated_system.rb
index e522566..c31207b 100644
--- a/lib/authenticated_system.rb
+++ b/lib/authenticated_system.rb
@@ -60,7 +60,11 @@ module AuthenticatedSystem
       if logged_in? && authorized?
         true
       else
-        access_denied
+        if params[:require_login_popup]
+          render :json => { :require_login_popup => true }
+        else
+          access_denied
+        end
       end
     end
 
diff --git a/public/javascripts/require_login.js b/public/javascripts/require_login.js
new file mode 100644
index 0000000..c0ec892
--- /dev/null
+++ b/public/javascripts/require_login.js
@@ -0,0 +1,25 @@
+(function($) {
+  $(window).bind('userDataLoaded', function(event, data) {
+    $(".require-login-popup").live('click', function(){
+      clicked = $(this);
+      url = clicked.attr("href");
+      if(url!=undefined && url!='' && url!='#') {
+        if(!data.login) {
+          url = $.param.querystring(url, "require_login_popup=true");
+        }
+        loading_for_button(this);
+        $.post(url, function(data){
+          if(data.require_login_popup) {
+            $('#link_login').click(); //TODO see a better way to show login popup
+          }
+        }).complete(function() {
+          clicked.css("cursor","");
+          $(".small-loading").remove();
+        });
+      } else {
+        $('#link_login').click();
+      }
+      return false;
+    });
+  });
+})(jQuery);
--
libgit2 0.21.2