Adds supports.js.coffee

app/assets/javascripts/application.js

@@ -36,6 +36,7 @@
 //= require tags
 //= require users
 //= require votes
+//= require supports
 //= require annotatable
 //= require advanced_search
 //= require registration_form
@@ -53,6 +54,7 @@ var initialize_modules = function() {
   App.Comments.initialize();
   App.Users.initialize();
   App.Votes.initialize();
+  App.Supports.initialize();
   App.Tags.initialize();
   App.Dropdown.initialize();
   App.LocationChanger.initialize();

app/assets/javascripts/supports.js.coffee

@@ -0,0 +1,12 @@
+App.Supports =
+
+  initialize: ->
+    $(document).on {
+      'mouseenter focus': ->
+        $(this).find(".js-supports-not-allowed").show();
+        $(this).find(".js-supports-allowed").hide();
+      mouseleave: ->
+        $(this).find(".js-supports-not-allowed").hide();
+        $(this).find(".js-supports-allowed").show();
+    }, ".js-supports"
+    false