title: drop down change fire show same element
body: <pre><code>&lt;span id="row-0" class="row"&gt;
     &lt;span class="Foo"&gt;
        &lt;select name="first[]"&gt;
              &lt;option value="XX"&gt;XX&lt;/option&gt;
              &lt;option value="YY"&gt;YY&lt;/option&gt;
              &lt;option value="ZZ"&gt;ZZ&lt;/option&gt;
        &lt;/select&gt;
     &lt;/span&gt;
     &lt;span class="Foo"&gt;
         &lt;select name="second[]"&gt;
              &lt;option value=""&gt;&lt;/option&gt;
              &lt;option value="AA"&gt;AA&lt;/option&gt;
              &lt;option value="BB"&gt;BB&lt;/option&gt;
              &lt;option value="CC"&gt;CC&lt;/option&gt;
          &lt;/select&gt;
     &lt;/span&gt;
  &lt;/span&gt;
  </code></pre>
  
  <p>I have a row which have two different select. When ever both filled I want to show another row. How can it be achieved using jquery?</p>