order through links, form ... &lt;/option&gt;
    &lt;option value="H24"&gt;H24: Providing text alternatives for the area ... &lt;/option&gt;
  &lt;/optgroup&gt;
  &lt;optgroup label="CSS Techniques"&gt;
    &lt;option value="C6"&gt;C6: Positioning content based on structural markup... &lt;/option&gt;
    &lt;option value="C7"&gt;C7: Using CSS to hide a portion of the link text... &lt;/option&gt;
  &lt;/optgroup&gt;
  &lt;optgroup label="SMIL Techniques"&gt;
    &lt;option value="SM1"&gt;SM1: Adding extende