anchor.diff:    </ul>
   
     <br />
  -  <%= f.submit 'Search' %><br>
  +  <%= f.submit 'Search' %> <%= link_to (submit_tag 'Show all', :type => 'button'), :action=>:index %><br>
     <% end %>
   <% end %>
   
  
positive.code:     return false;  
    });
  }); 
  </script>
  <% content_for :sidebar_left do %>
  <% form_for :participant, @search_participant, :url => { :action => "index" },
  :html => {:method => "get", :class => "search"} do |f| %>
  
negative.code: <!--<script>
  $(document).ready(function (){  
    jQuery.ajaxSetup({  
      'beforeSend': function (xhr) {xhr.setRequestHeader("Accept", "text/javascript")}  
  