application.js

$(document).ready(function() {
  $("div.votes a").click(function() {
    $.post( this.href, {"vote[vote]": (this.className == "vote_up") ? 1 : -1} );
    $(this).parent().children("a").hide();
    
    $(this).parent().html("<img src=\"/images/accept.png\" />Voted");
    
    var count = intParse($(this).parent().parent().children("div.count").text());
    $(this).parent().parent().children("div.count").text((count+1));
    
    return false;
  });
})

index.html

<div>
              <h3>jdoe</h3>

              <ul>
                <li>2009-01-03</li>
                <li>Refactors: 2</li>
              </ul>
            </div>
            <div>
              <div>
                <div class='count'>0</div>

                <div class='votes'>
                  <a class="vote_up" href="/snippets/1/refactors/2/votes"><img src="/images/add.png?010416490230" /></a>
                  <a class="vote_down" href="/snippets/1/refactors/2/votes"><img src="/images/delete.png?010416490219" /></a>
                </div>
              </div>
              <table class="CodeRay"><tr>
                <td class="line_numbers" title="click to toggle" onclick="with (this.firstChild.style) { display = (display == '') ? 'none' : '' }"><pre><tt>&#x000A;</tt></pre></td>
                <td class="code"><pre ondblclick="with (this.style) { overflow = (overflow == 'auto' || overflow == '') ? 'visible' : 'auto' }"><span class="r">def</span> <span class="fu">hello</span><span class="er">\</span>n<span class="er">\</span>tprint <span class="s"><span class="dl">&quot;</span><span class="k">hello</span><span class="dl">&quot;</span></span><span class="er">\</span>nend</pre></td>

              </tr></table>
            </div>