anchor.diff:  <div class = "exp">
   <%if user_list.length > 0%>
  -
   <table>
     <tr>
       <th colspan=5></th>
  
positive.code:     <th class="head">Handle</th>
      <th class="head">Action</th>
    </tr>
    
  <% for participant in user_list 
     user = User.find(participant.user_id) %>
    <tr class= "exp">
      <td ><%= link_to user.name, :controller=> 'users', :action => 'show', :id => user.id %></td>
      <td ><%= user.fullname %></td>
  
negative.code:     <td ><%= participant.handle %></td>
             
      <td ><%= link_to 'Remove', {:controller => controller, :action => 'destroy', :id => participant.id}, :method => :delete %></td>
  
      <!-- E726 Fall2012 Changes Begin -->
      <% if participant.special_role=='Reader' %>
        <td><%= fa_icon 'book', title: 'Reader' %></td>
      <% else %>
        <td></td>
      <% end %>
      <!-- E726 Fall2012 Changes End -->
  
      <td>
        <%= form_tag(:controller=>'participant', :action=>'update') do %>
          <select id=<%=participant.user_id%> name="roles" style="font-size:12px">
            <option value="participant" 
              <% if params[:roles] == "participant" -%>
                selected
              <% end -%>
            >participant</option>
            <option value="reader"
              <% if params[:roles] == "reader" -%>
                selected
              <% end -%>
            >reader</option>
            <option value="reviewer"
              <% if params[:roles] == "reviewer" -%>
                selected
              <% end -%>
            >reviewer</option>
            <option value="submitter"
              <% if params[:roles] == "submitter" -%>
                selected
              <% end -%>
            >submitter</option>
          </select>
          <%= button_tag "Submit", {:id=>'button'+participant.user_id.to_s,:style=>"font-size:12px; display:none;"} %>
        <% end %>
      </td>
      
    </tr>
  <% end -%>
  </table>
  <% end -%>
  
  </div>    
  
  
  <script>
    var participants = <%=@user_id%>;
    participants.forEach(function(participant){
      $('#'.concat(participant.toString())).change(function(){
        $('#button'.concat(participant.toString())).show();
      });
    });
  </script>