title: Changing class name of next select element
body: <p>I can change property of second select element if i have code like this..</p>
  
  <pre><code>&lt;select class="services_list1"&gt;
  &lt;option&gt;Value 1&lt;/option&gt;
    &lt;option&gt;Value 2&lt;/option&gt;
  &lt;/select&gt;
  &lt;select class="services_list2"&gt;
  &lt;option&gt;Value 1&lt;/option&gt;
    &lt;option&gt;Value 2&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>But the problem is, I am having two select element as following.. How to change the class name of second services_list2 on onchange() of services_list1.</p>
  
  <pre><code> &lt;td&gt;
          &lt;select class="services_list1"&gt;
  &lt;option&gt;Value 1&lt;/option&gt;
    &lt;option&gt;Value 2&lt;/option&gt;
  &lt;/select&gt;
      &lt;/td&gt;
      &lt;td&gt;
          &lt;select class="services_list2"&gt;
  &lt;option&gt;Value 1&lt;/option&gt;
    &lt;option&gt;Value 2&lt;/option&gt;
  &lt;/select&gt;
      &lt;/td&gt;
  </code></pre>