alt tags for images

lib/widget/filters/date.rb

@@ -1,7 +1,9 @@
 class Widget::Filters::Date < Widget::Filters::Base
 
   def calendar_for(field_id)
-    image_tag("calendar.png", {:id => "#{field_id}_trigger",:class => "calendar-trigger"}) +
+    image_tag("calendar.png", { :id => "#{field_id}_trigger",
+                                :class => "calendar-trigger",
+                                :alt => l(:label_calendar) }) +
     javascript_tag("Calendar.setup({inputField : '#{field_id}', ifFormat : '%Y-%m-%d', button : '#{field_id}_trigger' });")
   end
 

lib/widget/filters/multi_values.rb

@@ -33,7 +33,9 @@ class Widget::Filters::MultiValues < Widget::Filters::Base
         end
         plus = content_tag :a, :href => 'javascript:', :class => "filter_multi-select", :"data-filter-name" => filter_class.underscore_name,
           :title => l(:description_multi_select) do
-          image_tag 'bullet_toggle_plus.png', :style => "vertical-align: bottom;"
+          image_tag 'bullet_toggle_plus.png',
+                    :alt => l(:toggle_multiselect),
+                    :style => "vertical-align: bottom;"
         end
         label + box + plus
       end