diff --git a/app/assets/javascripts/controllers/trainings.coffee.erb b/app/assets/javascripts/controllers/trainings.coffee.erb
index c6d7f2fb3..f7c8589fc 100644
--- a/app/assets/javascripts/controllers/trainings.coffee.erb
+++ b/app/assets/javascripts/controllers/trainings.coffee.erb
@@ -452,11 +452,12 @@ Application.Controllers.controller "ReserveTrainingController", ["$scope", "$sta
   # @see http://fullcalendar.io/docs/event_rendering/eventRender/
   ##
   eventRenderCb = (event, element, view)->
-    element.attr(
-      'uib-popover': $filter('humanize')($filter('simpleText')(event.training.description), 70)
-      'popover-trigger': 'mouseenter'
-    )
-    $compile(element)($scope)
+    # Comment these codes for show a popup of description, because we add feature page of training
+    #element.attr(
+    #  'uib-popover': $filter('humanize')($filter('simpleText')(event.training.description), 70)
+    #  'popover-trigger': 'mouseenter'
+    #)
+    #$compile(element)($scope)
 
 
 
diff --git a/app/assets/javascripts/filters/filters.coffee b/app/assets/javascripts/filters/filters.coffee
index 884afac3c..fbf73f7c5 100644
--- a/app/assets/javascripts/filters/filters.coffee
+++ b/app/assets/javascripts/filters/filters.coffee
@@ -112,7 +112,7 @@ Application.Filters.filter "breakFilter", [ ->
 ##
 Application.Filters.filter "simpleText", [ ->
   (text) ->
-    if text != undefined
+    if text?
       text = text.replace(/<br\s*\/?>/g, '\n')
       text.replace(/<\/?\w+[^>]*>/g, '')
     else