Index: app/helpers/sort_helper.rb
===================================================================
--- app/helpers/sort_helper.rb	(révision 5191)
+++ app/helpers/sort_helper.rb	(copie de travail)
@@ -114,6 +114,26 @@
       @criteria.first && @criteria.first.last
     end
 
+    def second_key
+      return nil if @criteria.size < 2
+      @criteria[1] && @criteria[1].first
+    end
+
+    def second_asc?
+      return false if @criteria.size < 2
+      @criteria[1] && @criteria[1].last
+    end
+
+    def third_key
+      return nil if @criteria.size < 3
+      @criteria[2] && @criteria[2].first
+    end
+
+    def third_asc?
+      return false if @criteria.size < 3
+      @criteria[2] && @criteria[2].last
+    end
+
     def empty?
       @criteria.empty?
     end
@@ -247,9 +267,22 @@
   #   sort_css_classes
   #   # => "sort-by-created-on sort-desc"
   def sort_css_classes
+    sort_css_cls = ''
     if @sort_criteria.first_key
-      "sort-by-#{@sort_criteria.first_key.to_s.dasherize} sort-#{@sort_criteria.first_asc? ? 'asc' : 'desc'}"
+      sort_css_cls << "sort-by-#{@sort_criteria.first_key.to_s.dasherize} sort-#{@sort_criteria.first_asc? ? 'asc' : 'desc'}"
     end
+
+    if @sort_criteria.second_key
+      sort_css_cls << ' ' if sort_css_cls != ''
+      sort_css_cls << "sort2-by-#{@sort_criteria.second_key.to_s.dasherize} sort2-#{@sort_criteria.second_asc? ? 'asc' : 'desc'}"
+    end
+
+    if @sort_criteria.third_key
+      sort_css_cls << ' ' if sort_css_cls != ''
+      sort_css_cls << "sort3-by-#{@sort_criteria.third_key.to_s.dasherize} sort3-#{@sort_criteria.third_asc? ? 'asc' : 'desc'}"
+    end
+
+    sort_css_cls
   end
 end