gistfile1.txt

# This should be in view_helpers.rb:

  def logged_in?
     boolean_param(:logged_in)
  end   

# my template code
<% unless logged_in? %>
  <script type="text/javascript" charset="utf-8">
    alert('done')
  </script>
<% end %>

# Now if you hit /template-name?logged_in=true the code above will not render