III-d Fix 3: Make frames accessible

Warning: It's easy to use frames in a way that causes usability problems. Advance with caution.

To provide navigation alternatives, assign titles to frames and add a "noframes" alternative:

 <frame ... name="TOC"
             title="Table of Contents" >
  <frame ... name="Home"
             title="Home Page" > 
      <p><a href="a">
         <img src="vnav.gif" border=0 usemap="#map" 
              alt="Navigation Bar..."></a>

Related WCAG 1.0 checkpoint: 12.1.