RAILS: Printing out debug information

To have a constant printout of the session and params data, place the following code at the very bottom of the layout template(s):

<%= javascript_include_tag 'prototype' %>
<div style="color:#eee;font-size:10pt">
 <% if ENV['RAILS_ENV'] == 'development' %>
     <div id="debug" style="margin: 40px 5px 5px 5px;">
         <a href="#" onclick="Element.toggle('debug_info');return false" style="text-decoration: none; color: #ccc;">Show Debug Info ➲</a>
         <div id="debug_info" style="display : none;">
             Session:<br>
             <%= debug session %>
             Params:<br>
             <%= debug params %>
         </div>
     </div>
 <% end %>
</div>