title: How to get the parent value of <LI>
body: <p>Fore example I have a list like this:</p>
  
  <pre><code>&lt;ul id='left_faq_tips_navi'&gt;
    &lt;li&gt;Test
      &lt;ul&gt;
        &lt;li&gt;A&lt;/li&gt;
        &lt;li&gt;B&lt;/li&gt;
      &lt;/ul&gt;
    &lt;/li&gt;
  
    &lt;li&gt;Test 2
       &lt;ul&gt;
         &lt;li&gt;C&lt;/li&gt;
         &lt;li&gt;D&lt;/li&gt;
       &lt;/ul&gt;
    &lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>
  
  <p>How can I get the TEST 2 value when I click on "C".</p>
  
  <pre><code>var ul = $('#left_faq_tips_navi').find('ul').attr('id')
  </code></pre>
  
  <p>This result give me undefined answer.</p>