Use HTML labels with your radio buttons, please; I don't want to have to aim for the little circle.

   </body>
 </html>
 <script>

hem. use this instead:

      <script type="text/javascript">
      …
      </script>
    </body>
 </html>

I doubt it will be any efficient compared to native implementation. Cool hack though, it reminds my when I played around with basic real 3D drawing with Quick Basic.