anchor.diff:  
   <!-- Form for the user to select filter options -->
   <%= form_for :filter_options, url: "analytics", :method=> "post" do |f| %>
  -  <%= hidden_field_tag :authenticity_token, form_authenticity_token %>
     <%= hidden_field_tag :row_page, @row_page %>
     <%= hidden_field_tag :col_page, @col_page %>
     <%= f.label "Sort by: " %>
  
positive.code:   <thead>
      <tr>
        <!-- Depending on the filter, the first column should be 'Customer' or 'State' -->
        <th> rawr<!-- Filter name here --> </th>
        <!-- @col_names is a pre-sorted list of columns -->
        <% @col_names.each do |col| %>
          <th><%= col.unique_name %></th>
        <% end %>
      </tr>
    </thead>
    <tbody>
      <!-- Render the first K rows in one of two modes:
           - Alphabetical
           - Top-K, where default K = 20
      -->
    </tbody>
  </table>
  
negative.code: 
  <!-- Hidden form for keeping track of the page's displayed columns -->
  <%= form_for :filter_options, url: "analytics", :method=> "post" do |f| %>
    <%= hidden_field_tag :col_page, @col_page + 1 %>
    <%= hidden_field_tag :state_or_cust, @state_or_cust %>
    <%= hidden_field_tag :alpha_or_top, @alpha_or_top %>
  