title: Can't figure out how to get time attribute
body: <p>I'm having trouble using the <code>ImportXML()</code> function in Google spreadsheets. I would like to retrieve the time of posting on several <a href="https://docs.google.com/spreadsheet/ccc?key=0AgLkBqMZYl2FdDJ6dFJhUmZWUHVoNVdzRUprOEZRM3c" rel="nofollow">Reddit posts in a spreadsheet</a>, but I'm only having luck getting 28 Apr 2012, instead of 2012-04-28T02:19:06.348481+00:00, which is what I would like. </p>
  
  <p>For example, <a href="http://www.reddit.com/r/BuyItForLife/comments/sw9m5/choosing_the_right_kitchen_knife_alton_brown/" rel="nofollow">on this web page</a>, I look in the source and see the following:</p>
  
  <pre><code>&lt;div class='spacer'&gt;&lt;div class="linkinfo"&gt;
      &lt;div class="date"&gt;
          &lt;span&gt;this post was submitted on &amp;#32;&lt;/span&gt;
              &lt;time datetime="2012-04-28T02:19:06.348481+00:00"&gt;28 Apr 2012&lt;/time&gt;
      &lt;/div&gt;
  &lt;div class="score"&gt;
  </code></pre>
  
  <p>However, this is the only line I can get to do anything:</p>
  
  <pre><code>=ImportXML(
  "http://www.reddit.com/r/BuyItForLife/comments/jtjuz/bi4l_mission_statement_rules_etc/",
  "//div[@class='date']")
  </code></pre>
  
  <p>Any suggestions? I've been searching and trying and searching and trying, and nothing is working.</p>