  &lt;option value="10"&gt;...&lt;/option&gt;
     &lt;/optgroup&gt;
   &lt;/select&gt;
&lt;/form&gt;              </pre>
      </section>
      <section class="example">
         <section class="description"><h2>Description</h2>
            <p>The following example shows how a multi-select box can make use of the optrgroup element.</p>
         </section>
         <pre xml:space="preserve">
&lt;form action="http://example.com/prog/someprog" method="post"&gt;
    &lt;label for="related_techniques"&gt;&lt;st