title: visual_effect after replace_html not working in rjs
body: <p>In learning ruby on rails I've created a blog site. When the user adds a post via AJAX, the following rjs gets called:</p>
  
  <pre><code>page.replace_html 'posts',  :partial =&gt; @posts
  page.visual_effect :Highlight, 'post_' + @post.id.to_s
  </code></pre>
  
  <p>However, the highlight isn't happening.. neither is any sort of effect even a hide. </p>
  
  <p>Clues:</p>
  
  <ul>
  <li>It works if I just do an insert_html
  for just the new post    (but I want
  to update the whole list    of posts
  at this time)    </li>
  <li>If I hard code the id to the next id in the sequence, it doesn't work on the post, but it does work on the next post. { ex.. hardcode post_100... no highlight on submit 100, highlight 100 on submit 101 }</li>
  <li>Alert shows that 'post_' + @post.id.to_s is what is expected ( post_100, etc )</li>
  </ul>
  
  <p>Any ideas or debugging suggestions? </p>
  
  <p>Thanks,
  Orlando</p>