page.visual_effect :blind_up, "new_comment_form_for_post_#{@post.id}" 
page.replace_html "comments_for_post_#{@post.id}", 
                  :partial => "comments/comment", 
                  :collection => @post.comments 
page.show "add_comment_link_for_post_#{@post.id}" 
page.visual_effect :highlight, "comment_#{@comment.id}", :duration => 2