文件下载的排序，操作部分不需要排序

app/views/files/index.html.erb

@@ -71,7 +71,7 @@
     <%= sort_header_tag('created_on', :caption => l(:label_date), :default_order => 'desc', :scope =>"col" , :id => "vzebra-comedy")%>
     <%= sort_header_tag('size', :caption => l(:field_filesize), :default_order => 'desc', :scope =>"col", :id=> "vzebra-children")%>
     <%= sort_header_tag('downloads', :caption => l(:field_downloads), :default_order => 'desc', :scope =>"col", :id => "vzebra-action") %>
-    <%= sort_header_tag('downloads', :caption => "", :scope =>"col", :id => "vzebra-children") %>
+    <%= sort_header_tag('operation', :caption => "", :scope =>"col", :id => "vzebra-children") %>
     <!-- <%= sort_header_tag('description', :caption => l(:field_description)) %> -->
   </tr></thead>
   <tbody>