<%= link_to(image_tag( 'blank.png', :width=>'16', :height=>'16', :border=>'0' ), nil, {:class => 'show_notes', :title => 'Show notes'}) %>
<% apply_behavior 'a.show_notes:click', :prevent_default => true do |page, element|
     element.next('.todo_notes').toggle
   end
-%>
      <div class="todo_notes" id="<%= dom_id(item, 'notes') %>" style="display:none">
        <%= markdown( item.notes ) %>
      </div>