title: Unable to Set Hidden HTML Input Value
body: <p>I have a radio input:</p>
  
  <pre><code>&lt;INPUT TYPE="radio" NAME="test" id="test" VALUE="product" CHECKED&gt;Product&lt;BR&gt;
  &lt;INPUT TYPE="radio" NAME="test" id="test" VALUE="company"&gt;Supplier&lt;BR&gt; 
  </code></pre>
  
  <p>now I want to set a radio's value to a hidden value. like this:</p>
  
  <pre><code>&lt;input type="hidden" name="module" id="hdModule" onchange="document.getElementById('test').value=this.value" /&gt;
  </code></pre>
  
  <p>but it doesn't work.</p>