anchor.diff:        <% for topic in @sign_up_topics %>
           <tr>
             <%= render :partial => '/sign_up_sheet/table_line', :locals => {:i=>i, :topic=>topic} %>
  -          <td align="center">
  -            <% topic_identifier = SignUpTopic.where(assignment_id: @assignment.id).map {|u| [u.topic_identifier, u.id] } %>
  -            <% topic_identifier.delete([topic.topic_identifier, topic.id]) %>
  -            <% select = TopicDependency.find_by_topic_id(topic.id)%>
  -            <% selected = Array.new%>
  -            <% if !select.nil?
  -                 selected = select[:dependent_on].to_a
  -            end%>
  -            <%= select_tag 'topic_dependencies_' + topic.id.to_s + '[dependent_on][]', options_for_select( topic_identifier, selected), :multiple => true, :size => 2 %>
  -          </td>
  -
           </tr>
           <% i=i+1 %>
         <% end %>
  
positive.code:   <% end %>
  
  <% end %>
  
  <script>
    jQuery('select').multiSelect({ selectedList:5, minWidth:235, noneSelected:"No dependency"});
  </script>
negative.code: <%= render :partial => '/sign_up_sheet/add_topics' %>
  
  <% if @assignment.staggered_deadline == true %>
  
    | <a href="#due_date" onClick="toggleVis('due_date');">
      <span class="inline" id="due_date_show">Show start/due date</span>
  