title: How to make a dependent radio button based on the option selected?
body: <p>How do I make a dependent radio button based on the option selected?</p>
  
  <p>If Engineering Projects is selected, then a radio button should appear and it must have radio buttons of abc, def, ghi, etc.</p>
  
  <p>If MCA Projects is selected then a radio button should appear and it must have radio buttons of jsp, asp, php, java, etc.</p>
  
  <p>If none are selected, no radio button should appear.</p>
  
  <pre><code>&lt;p&gt;
      Area Of Interest
      &lt;select name="formGender"&gt;
          &lt;option value=""&gt;Select...&lt;/option&gt;
          &lt;option value="e"&gt;Engineering Project&lt;/option&gt;
          &lt;option value="m"&gt;MCA Projects&lt;/option&gt;
          &lt;option value="t"&gt;M-Tech Projects&lt;/option&gt;
          &lt;option value="s"&gt;Msc Projects&lt;/option&gt;
      &lt;/select&gt;
  &lt;/p&gt;
  </code></pre>