page.visual_effect :fade, "comment-#{@comment.id}", :duration => 1.0
page.delay 1 do
  page["comment-#{@comment.id}"].remove
end

--------------------------------------------------------------------------

<% form_tag 'sessions' do -%>
    <label for="email">Email:</label>
    <%= text_field_tag :email %>
  <label for="password">Password:</label>
  <%= password_field_tag :password %>
  <%= submit_tag 'Login' %>
<% end -%>