diff --git a/app/controllers/public/comment_controller.rb b/app/controllers/public/comment_controller.rb
index 5cf52dd..a983746 100644
--- a/app/controllers/public/comment_controller.rb
+++ b/app/controllers/public/comment_controller.rb
@@ -160,6 +160,15 @@ class CommentController < ApplicationController
      end
    end
   end
+  
+  #FIXME make this test
+  def check_actions
+    comment = profile.comments_received.find(params[:id])
+    ids = @plugins.dispatch(:check_comment_actions, comment).collect do |action|
+      action.kind_of?(Proc) ? self.instance_eval(&action) : action
+    end.flatten.compact
+    render :json => {:ids => ids}
+  end
 
   protected
 
diff --git a/app/helpers/comment_helper.rb b/app/helpers/comment_helper.rb
index b9a909a..aee6300 100644
--- a/app/helpers/comment_helper.rb
+++ b/app/helpers/comment_helper.rb
@@ -23,8 +23,9 @@ module CommentHelper
   end
   
   def comment_actions(comment)
+    url = url_for(:profile => profile.identifier, :controller => :comment, :action => :check_actions, :id => comment.id)
     links = links_for_comment_actions(comment)
-    content_tag(:li, link_to(content_tag(:span, _('Contents menu')), '#', :onclick => "toggleSubmenu(this,'',#{links.to_json}); return false", :class => 'menu-submenu-trigger'), :class=> 'vcard') unless links.empty?
+    content_tag(:li, link_to(content_tag(:span, _('Contents menu')), '#', :onclick => "toggleSubmenu(this,'',#{links.to_json}); return false", :class => 'menu-submenu-trigger comment-trigger', :url => url), :class=> 'vcard') unless links.empty?
   end
 
   private
diff --git a/lib/noosfero/plugin.rb b/lib/noosfero/plugin.rb
index 83e408b..28a87a1 100644
--- a/lib/noosfero/plugin.rb
+++ b/lib/noosfero/plugin.rb
@@ -289,6 +289,18 @@ class Noosfero::Plugin
     nil
   end
 
+  # This method is called when the user click on comment actions menu.
+  # returns = list or lambda block that return ids of enabled menu items for comments
+  # example:
+  #
+  #   def check_comment_actions(comment)
+  #     ['#action1', '#action2']
+  #   end
+  #
+  def check_comment_actions(comment)
+    []
+  end
+
   # -> Adds fields to the signup form
   # returns = lambda block that creates html code
   def signup_extra_contents
diff --git a/public/javascripts/add-and-join.js b/public/javascripts/add-and-join.js
index 9055491..db5a4b9 100644
--- a/public/javascripts/add-and-join.js
+++ b/public/javascripts/add-and-join.js
@@ -100,4 +100,24 @@ jQuery(function($) {
         clicked.parent().find(".send-an-email").fadeOut();
     })
   })
+
+  $(".comment-trigger").live('click', function(){
+    clicked = $(this);
+    url = clicked.attr("url");
+    $.get(url, function(data){
+      ids = [];
+      if(data && data.ids) {
+        for(var i=0; i<data.ids.length; i++) {
+          clicked.parent().find(data.ids[i]).fadeIn();
+          ids.push(data.ids[i]);
+        }
+      }
+      clicked.parent().find('.comment-action-extra').each(function() {
+        if($.inArray('#'+$(this).attr('id'), ids))
+          $(this).fadeOut();
+      });
+    })
+    return false;
+  })
+
 });
diff --git a/test/functional/comment_controller_test.rb b/test/functional/comment_controller_test.rb
index 02022de..8613f33 100644
--- a/test/functional/comment_controller_test.rb
+++ b/test/functional/comment_controller_test.rb
@@ -501,7 +501,7 @@ class CommentControllerTest < ActionController::TestCase
     assert_equal 'Comment edited', Comment.find(comment.id).body
   end
 
-   should 'not crash on update comment if comment does not exist' do
+  should 'not crash on update comment if comment does not exist' do
     login_as profile.identifier
     page = profile.articles.create!(:name => 'myarticle', :body => 'the body of the text')
 
@@ -509,4 +509,18 @@ class CommentControllerTest < ActionController::TestCase
     assert_response 404
   end
 
+  should 'returns ids of menu items that has to be displayed' do
+    class TestActionPlugin < Noosfero::Plugin
+      def check_comment_actions(c)
+        ['action1', 'action2']
+      end
+    end
+    Noosfero::Plugin::Manager.any_instance.stubs(:enabled_plugins).returns([TestActionPlugin.new])
+    login_as profile.identifier
+    page = profile.articles.create!(:name => 'myarticle', :body => 'the body of the text')
+    comment = fast_create(Comment, :body => 'Original comment', :source_id => page.id, :source_type => 'Article')
+    xhr :post, :check_actions, :profile => profile.identifier, :id => comment.id
+    assert_match /\{\"ids\":\[\"action1\",\"action2\"\]\}/, @response.body
+  end
+
 end
--
libgit2 0.21.2