line 8 column 1 - Warning: <img> should use client-side image map
line 9 column 14 - Warning: <img> should use client-side image map
Info: Doctype given is "-//W3C//DTD HTML 4.01 Transitional//EN"
Info: Document content looks like HTML 4.01 Transitional
2 warnings, 0 errors were found!

Use client-side image maps in preference to server-side image
maps as the latter are inaccessible to people using non-
graphical browsers. In addition, client-side maps are easier
to set up and provide immediate feedback to users.

For further advice on how to make your pages accessible
see http://www.w3.org/WAI/GL.
. You may also want to try
"http://www.cast.org/bobby/" which is a free Web-based
service for checking URLs for accessibility.

About HTML Tidy: https://github.com/htacg/tidy-html5
Bug reports and comments: https://github.com/htacg/tidy-html5/issues
Or send questions and comments to: https://lists.w3.org/Archives/Public/public-htacg/
Latest HTML specification: http://dev.w3.org/html5/spec-author-view/
Validate your HTML documents: http://validator.w3.org/nu/
Lobby your company to join the W3C: http://www.w3.org/Consortium