<%= form_tag(comments_path) do %>
<%= hidden_field "comment", "post_id", :value => post.id %>
<%= text_area "comment", "body", :size => "60x7" %>
<%= submit_tag "Post" %>
<%= submit_tag "Preview" %>
<%= link_to "Formatting", wiki_pages_path(:title => "help:dtext") %>
<% end %>