title: How to find <tr> inside <table> with depth 1?
body: <pre><code>$(this).parents('table:first').find('tr'))
  </code></pre>
  
  <p>The above will search for <code>tr</code> inside <code>table</code> recursively,how to make it only search for the top <code>tr</code>?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p><code>children</code> is not working as expected：</p>
  
  <pre><code>alert($(this).parents('table:first').children('tr').length)
  </code></pre>
  
  <p>gives 0</p>