anchor.diff:                <%= select_tag :sector,
                   options_for_select(@sectors_combo_values, params[:sector]), :class => :"chzn-select", :multiple => true, :size => 5, :placeholder => "Select sector" %>
                 <%# select_tag :sector_include, options_for_select({:include => 'include', :exclude =>'exclude'}) %>
  -              <%= hidden_field :sector_include, :value => 'include' %>
  +              <%= hidden_field_tag 'sector_include', 'include' %>
               </li>
   
               <li class="comboselect">
  
positive.code:               <%= select_tag :donor,
                  options_for_select(@donors_combo_values, params[:donor]), :class => :"chzn-select", :multiple => true, :size => 5, :placeholder => "Select donor"%>
                  <%# select_tag :donor_include, options_for_select({:include => 'include', :exclude =>'exclude'}) %>
                  <%= hidden_field :donor_include, :value => 'include' %>
              </li>
  
              <li class="comboselect date">
  
negative.code:               <%= select_tag :country,
                  options_for_select(@countries_combo_values, params[:country]), :class => :"chzn-select", :multiple => true, :size => 5, :placeholder => "Select country" %>
                <%# select_tag :country_include, options_for_select({:include => 'include', :exclude =>'exclude'}) %>
                <%= hidden_field_tag 'country_include', 'include' %>
              </li>
  
              <li class="comboselect">
  