title: if any checked check else uncheck
body: <p>can someone help me with some traversing and some logic here please. the logic is this: </p>
  
  <ol>
  <li>if any checkbox in column3 is checked then check the first column checkbox.</li>
  <li>if none in column 3 is selected, uncheck checkbox in column1</li>
  <li><p>if column1 checkbox is unchecked, then uncheck all checkboxes in column3</p>
  
  <p></p>
  
  <pre><code>&lt;table&gt;
      &lt;tr&gt;
         &lt;td&gt;&lt;input class="isSelected" type="checkbox" /&gt;&lt;/td&gt;
         &lt;td&gt;row1col2&lt;/td&gt;
         &lt;td&gt;&lt;input class="actionItem" type="checkbox" /&gt;&lt;input class="actionItem" type="checkbox" /&gt;&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;&lt;input class="isSelected" type="checkbox" /&gt;&lt;/td&gt;
          &lt;td&gt;row2col2&lt;/td&gt;
          &lt;td&gt;&lt;input class="actionItem" type="checkbox" /&gt;&lt;input class="actionItem" type="checkbox" /&gt;&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;&lt;input class="isSelected" type="checkbox" /&gt;&lt;/td&gt;
          &lt;td&gt;row3col2&lt;/td&gt;
          &lt;td&gt;&lt;input class="actionItem" type="checkbox" /&gt;&lt;input class="actionItem" type="checkbox" /&gt;&lt;/td&gt;
      &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p></p></li>
  </ol>