title: CSS - select th tags only within the tbody of a table
body: <p>I would like to use a css selector to get only the th tags with the tbody.  There are also th tags in the thead section, which I don't want included by the selector.  Here's the markup I'm working with.  Is there a selector to accomplish this?</p>
  
  <pre><code>&lt;table class="bgtable"&gt;
  &lt;thead&gt;&lt;tr&gt;&lt;td width="40%"&gt;&amp;nbsp;&lt;/td&gt;
  &lt;th class="tdplain"&gt;Grade 4&lt;/th&gt;
  &lt;th class="tdplain"&gt;Grade 8&lt;/th&gt;
  &lt;th class="tdplain"&gt;Grade 12&lt;/th&gt;
  &lt;/tr&gt;
  &lt;/thead&gt;
  &lt;tbody&gt;&lt;tr&gt;&lt;th class="tdplain"&gt;Civics (2010)&lt;/th&gt;
  &lt;td class="tdplain"&gt;769K&lt;/td&gt;
  &lt;td class="tdplain"&gt;577K&lt;/td&gt;
  &lt;td class="tdplain"&gt;1179K&lt;/td&gt;
  &lt;/tr&gt;
  &lt;/tbody&gt;
  &lt;/table&gt;
  </code></pre>