title: onclick not firing for download
body: <p>Im having trouble with a onclick event for a download. It does not want to fire when I click on the link. It just carries on as normal. But it does work with an external link. Have I done something obviously wrong?</p>
  
  <pre><code>&lt;a href="http://www.wildlifetrusts.org/" target="_blank" onclick="trackExternalLink(this, '/links-the_royal_society_of_wildlife_trusts');"&gt;Royal Society of Wildlife Trusts.&lt;/a&gt;
  &lt;a href="/c2/uploads/our strategy for 2010_15.pdf" target="_blank" onclick="trackExternalLink(this, '/downloads-our_strategy_for_2010-15');"&gt;2010-2015 strategy,&lt;/a&gt;
  </code></pre>
  
  <p>Its doing the same in FF, Chrome and IE 8.</p>
  
  <pre><code>function trackExternalLink(link, action) {
  _gaq.push(['_trackPageview', action]);
  setTimeout('document.location = "' + link.href + '"', 25000)
  return false;
  }
  </code></pre>