From: Laurent Monin <geeqie@norz.org>
Date: Mon, 10 Nov 2008 15:20:13 +0000 (+0000)
Subject: Fix up unvalid xhtml.
X-Git-Tag: v1.0.0~688
X-Git-Url: http://geeqie.org/cgi-bin/gitweb.cgi?p=geeqie.git;a=commitdiff_plain;h=0a594f66306b196a0d9872de6fecc4b3cc9c3511

Fix up unvalid xhtml.
---

diff --git a/doc/collections.html b/doc/collections.html
index 5c411e24..b3b76e2e 100644
--- a/doc/collections.html
+++ b/doc/collections.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_search_finding_duplicates.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Collections</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -440,24 +438,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_search_finding_duplicates.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/credits.html b/doc/credits.html
index 75220813..f4c41c2e 100644
--- a/doc/credits.html
+++ b/doc/credits.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_management.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Credits</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="gnu_fdl.txt">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -73,24 +71,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_management.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="gnu_fdl.txt">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/faq.html b/doc/faq.html
index 383a6dbe..7aad2949 100644
--- a/doc/faq.html
+++ b/doc/faq.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="index.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Frequently Asked Questions</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="introduction.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -86,24 +84,22 @@ geeqie -r -sS -d12 -ss
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="index.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="introduction.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_management.html b/doc/image_management.html
index 1ea12b8b..cc25a00d 100644
--- a/doc/image_management.html
+++ b/doc/image_management.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="other_windows_image_properties.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image Management</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_copy_move.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -60,24 +58,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="other_windows_image_properties.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_copy_move.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_management_copy_move.html b/doc/image_management_copy_move.html
index 97823d04..0c3dee80 100644
--- a/doc/image_management_copy_move.html
+++ b/doc/image_management_copy_move.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Copy and Move &ndash; Image Management</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_rename.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -101,24 +99,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_rename.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_management_delete.html b/doc/image_management_delete.html
index d29bb1ed..cfe36116 100644
--- a/doc/image_management_delete.html
+++ b/doc/image_management_delete.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_rename.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Delete &ndash; Image Management</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_external_editing.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -89,24 +87,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_rename.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_external_editing.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_management_external_editing.html b/doc/image_management_external_editing.html
index 33a9bb9b..59e68feb 100644
--- a/doc/image_management_external_editing.html
+++ b/doc/image_management_external_editing.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_delete.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">External Editing &ndash; Image Management</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_search.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -65,24 +63,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_delete.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_search.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_management_rename.html b/doc/image_management_rename.html
index 7f617685..fe53d92b 100644
--- a/doc/image_management_rename.html
+++ b/doc/image_management_rename.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_copy_move.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Rename &ndash; Image Management</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_delete.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -90,24 +88,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_copy_move.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management_delete.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_presentation.html b/doc/image_presentation.html
index daaf0cc0..74c5f40f 100644
--- a/doc/image_presentation.html
+++ b/doc/image_presentation.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars_keywords.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image Presentation</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_presentation_slideshow.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -58,24 +56,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars_keywords.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_presentation_slideshow.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_presentation_fullscreen.html b/doc/image_presentation_fullscreen.html
index 5c19d436..e7fe3f6c 100644
--- a/doc/image_presentation_fullscreen.html
+++ b/doc/image_presentation_fullscreen.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_presentation_slideshow.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Full Screen &ndash; Image Presentation</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="printing.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -429,24 +427,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_presentation_slideshow.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="printing.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_presentation_slideshow.html b/doc/image_presentation_slideshow.html
index e34b38d0..1dbbfa4c 100644
--- a/doc/image_presentation_slideshow.html
+++ b/doc/image_presentation_slideshow.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_presentation.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Slide Show &ndash; Image Presentation</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_presentation_fullscreen.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -138,24 +136,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_presentation.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_presentation_fullscreen.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_search.html b/doc/image_search.html
index 596c8fbb..f97b17ab 100644
--- a/doc/image_search.html
+++ b/doc/image_search.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_external_editing.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image Search</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_search_search.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -58,24 +56,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_management_external_editing.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_search_search.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_search_finding_duplicates.html b/doc/image_search_finding_duplicates.html
index fb6637b2..d6cb9a50 100644
--- a/doc/image_search_finding_duplicates.html
+++ b/doc/image_search_finding_duplicates.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_search_search.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Finding Duplicates &ndash; Image Search</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="collections.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -424,24 +422,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_search_search.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="collections.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/image_search_search.html b/doc/image_search_search.html
index cdc874e5..b636b3d3 100644
--- a/doc/image_search_search.html
+++ b/doc/image_search_search.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_search.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Search Window &ndash; Image Search</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_search_finding_duplicates.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -420,24 +418,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_search.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_search_finding_duplicates.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/index.html b/doc/index.html
index 467d2da9..b1b0c9b5 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -17,20 +17,18 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>&nbsp;</td>
+          <th>&nbsp;</th>
 
-          <td>
+          <th>
             <p class="navtop_title">Contents</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="introduction.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -43,7 +41,7 @@
   <div class="menu">
     <ul>
       <li><a href="introduction.html">Introduction</a></li>
-      <li><a href="main_window.html">Main Window</a></li>
+      <li><a href="main_window.html">Main Window</a>
       <ul>
 	<li><a href="main_window_navigation.html">Navigation</a></li>
 	<li><a href="main_window_menus.html">Menus</a></li>
@@ -53,37 +51,43 @@
 	<li><a href="main_window_image_pane.html">Image Pane</a></li>
 	<li><a href="main_window_status_bar.html">Status Bar</a></li>
       </ul>
-      <li><a href="other_windows.html">Other Windows</a></li>
+      </li>
+      <li><a href="other_windows.html">Other Windows</a>
       <ul>
 	<li><a href="other_windows_image_window.html">Image Window</a></li>
 	<li><a href="other_windows_image_properties.html">Image Properties Window</a></li>
       </ul>
-      <li><a href="image_management.html">Image Management</a></li>
+      </li>
+      <li><a href="image_management.html">Image Management</a>
       <ul>
 	<li><a href="image_management_copy_move.html">Copy and Move</a></li>
 	<li><a href="image_management_rename.html">Rename</a></li>
 	<li><a href="image_management_delete.html">Delete</a></li>
 	<li><a href="image_management_external_editing.html">External Editing Commands</a></li>
       </ul>
-      <li><a href="image_search.html">Image Search</a></li>
+      </li>
+      <li><a href="image_search.html">Image Search</a>
       <ul>
 	<li><a href="image_search_search.html">Search Window</a></li>
 	<li><a href="image_search_finding_duplicates.html">Finding Duplicate Images</a></li>
       </ul>
+      </li>
       <li><a href="collections.html">Collections</a></li>
-      <li><a href="sidebars.html">Sidebars</a></li>
+      <li><a href="sidebars.html">Sidebars</a>
       <ul>
 	<li><a href="sidebars_exif.html">EXIF</a></li>
 	<li><a href="sidebars_sort_manager.html">Sort Manager</a></li>
 	<li><a href="sidebars_keywords.html">Keywords</a></li>
       </ul>
-      <li><a href="image_presentation.html">Image Presentation</a></li>
+      </li>
+      <li><a href="image_presentation.html">Image Presentation</a>
       <ul>
 	<li><a href="image_presentation_slideshow.html">Slide show</a></li>
 	<li><a href="image_presentation_fullscreen.html">Full screen</a></li>
       </ul>
+      </li>
       <li><a href="printing.html">Printing</a></li>
-      <li><a href="options.html">Options</a></li>
+      <li><a href="options.html">Options</a>
       <ul>
 	<li><a href="options_general.html">General Options</a></li>
 	<li><a href="options_image.html">Image Options</a></li>
@@ -93,13 +97,15 @@
 	<li><a href="options_advanced.html">Advanced Options</a></li>
 	<li><a href="options_hidden.html">Hidden Options</a></li>
       </ul>
-      <li><a href="reference.html">Reference</a></li>
+      </li>
+      <li><a href="reference.html">Reference</a>
       <ul>
 	<li><a href="reference_command_line.html">Command Line Options</a></li>
 	<li><a href="reference_keyboard_shortcuts.html">Keyboard Shortcuts</a></li>
 	<li><a href="reference_thumbnails.html">Thumbnails</a></li>
 	<li><a href="reference_management.html">Cache and Data Management</a></li>
       </ul>
+      </li>
       <li><a href="credits.html">Credits</a></li>
       <li><a href="gnu_fdl.txt">GNU Free Documentation License</a></li>
     </ul>
@@ -112,19 +118,17 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
-        <tr>
-          <td>&nbsp;</td>
+      <tr>
+          <th>&nbsp;</th>
 
-          <td>&nbsp;</td>
+          <th>&nbsp;</th>
 
-          <td>
+          <th>
             <p class="next"><a href="introduction.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
-
+    
     </table>
   </div>
 
diff --git a/doc/introduction.html b/doc/introduction.html
index 306df573..330bc88e 100644
--- a/doc/introduction.html
+++ b/doc/introduction.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="index.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Introduction</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -120,24 +118,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="index.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window.html b/doc/main_window.html
index f68c1503..f04b61a4 100644
--- a/doc/main_window.html
+++ b/doc/main_window.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="introduction.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_navigation.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -62,24 +60,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="introduction.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_navigation.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_file_pane.html b/doc/main_window_file_pane.html
index d4acf641..feda7cef 100644
--- a/doc/main_window_file_pane.html
+++ b/doc/main_window_file_pane.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_layout.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">File Pane &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_folder_pane.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -150,24 +148,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_layout.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_folder_pane.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_folder_pane.html b/doc/main_window_folder_pane.html
index 1fa1ccd5..97b68a9f 100644
--- a/doc/main_window_folder_pane.html
+++ b/doc/main_window_folder_pane.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_file_pane.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Folder Pane &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_image_pane.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -144,24 +142,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_file_pane.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_image_pane.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_image_pane.html b/doc/main_window_image_pane.html
index ffbd0f0e..f59c76d3 100644
--- a/doc/main_window_image_pane.html
+++ b/doc/main_window_image_pane.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_folder_pane.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image Pane &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_status_bar.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -108,24 +106,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_folder_pane.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_status_bar.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_layout.html b/doc/main_window_layout.html
index a8520817..45df5105 100644
--- a/doc/main_window_layout.html
+++ b/doc/main_window_layout.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_menus.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Layout &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_file_pane.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -75,24 +73,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_menus.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_file_pane.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_menus.html b/doc/main_window_menus.html
index 168d2732..e0b93f1f 100644
--- a/doc/main_window_menus.html
+++ b/doc/main_window_menus.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_navigation.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Menus &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_layout.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -248,24 +246,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_navigation.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_layout.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_navigation.html b/doc/main_window_navigation.html
index 02d3f412..be597813 100644
--- a/doc/main_window_navigation.html
+++ b/doc/main_window_navigation.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Navigation &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_menus.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -77,24 +75,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="main_window_menus.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/main_window_status_bar.html b/doc/main_window_status_bar.html
index b696a0a8..dc4c0cdf 100644
--- a/doc/main_window_status_bar.html
+++ b/doc/main_window_status_bar.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_image_pane.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Status Bar &ndash; Main Window</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="other_windows.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -83,24 +81,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_image_pane.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="other_windows.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options.html b/doc/options.html
index 569bebcd..49baba30 100644
--- a/doc/options.html
+++ b/doc/options.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="printing.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_general.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -63,24 +61,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="printing.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_general.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_advanced.html b/doc/options_advanced.html
index cc93006d..3decaeb4 100644
--- a/doc/options_advanced.html
+++ b/doc/options_advanced.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_editor_commands.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Advanced &ndash; Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_hidden.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -139,24 +137,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_editor_commands.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_hidden.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_editor_commands.html b/doc/options_editor_commands.html
index 908852ab..dd7044e9 100644
--- a/doc/options_editor_commands.html
+++ b/doc/options_editor_commands.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_filtering.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Editors &ndash; Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_advanced.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -141,24 +139,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_filtering.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_advanced.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_filtering.html b/doc/options_filtering.html
index 058ed03d..9e830061 100644
--- a/doc/options_filtering.html
+++ b/doc/options_filtering.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_window.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Filtering &ndash; Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_editor_commands.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -87,24 +85,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_window.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_editor_commands.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_general.html b/doc/options_general.html
index 592a2f10..eabe2fe5 100644
--- a/doc/options_general.html
+++ b/doc/options_general.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">General &ndash; Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_image.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -105,24 +103,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_image.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_hidden.html b/doc/options_hidden.html
index 742d4fa1..95293c90 100644
--- a/doc/options_hidden.html
+++ b/doc/options_hidden.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_advanced.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Hidden &ndash; Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -79,24 +77,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_advanced.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_image.html b/doc/options_image.html
index 66d8a1eb..d538fc61 100644
--- a/doc/options_image.html
+++ b/doc/options_image.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_general.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image &ndash; Options Explaned</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_window.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -112,24 +110,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_general.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_window.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/options_window.html b/doc/options_window.html
index 47736da9..41554bf7 100644
--- a/doc/options_window.html
+++ b/doc/options_window.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_image.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Window &ndash; Options Explained</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_filtering.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -76,24 +74,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_image.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options_filtering.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/other_windows.html b/doc/other_windows.html
index 69bbaa4d..0220d63e 100644
--- a/doc/other_windows.html
+++ b/doc/other_windows.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_status_bar.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Other Windows</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="other_windows_image_window.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -58,24 +56,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="main_window_status_bar.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="other_windows_image_window.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/other_windows_image_properties.html b/doc/other_windows_image_properties.html
index d9aa2c20..478e94b5 100644
--- a/doc/other_windows_image_properties.html
+++ b/doc/other_windows_image_properties.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="other_windows_image_window.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image Properties &ndash; Other Windows</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -77,24 +75,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="other_windows_image_window.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_management.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/other_windows_image_window.html b/doc/other_windows_image_window.html
index c21dbaa9..c1ae49d5 100644
--- a/doc/other_windows_image_window.html
+++ b/doc/other_windows_image_window.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="other_windows.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Image Window &ndash; Other Windows</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="other_windows_image_properties.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -83,24 +81,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="previous.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="other_windows_image_properties.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/printing.html b/doc/printing.html
index d43b7bb8..ac2b1be6 100644
--- a/doc/printing.html
+++ b/doc/printing.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_presentation_fullscreen.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Printing</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -170,24 +168,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="image_presentation_fullscreen.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="options.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/reference.html b/doc/reference.html
index ddbbf3df..290928f2 100644
--- a/doc/reference.html
+++ b/doc/reference.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_hidden.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Reference</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_command_line.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -57,24 +55,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="options_hidden.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_command_line.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/reference_command_line.html b/doc/reference_command_line.html
index d475d072..e8cc0320 100644
--- a/doc/reference_command_line.html
+++ b/doc/reference_command_line.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Command Line Options &ndash; Reference</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_keyboard_shortcuts.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -472,24 +470,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_keyboard_shortcuts.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/reference_keyboard_shortcuts.html b/doc/reference_keyboard_shortcuts.html
index 10f8e743..c821bfbc 100644
--- a/doc/reference_keyboard_shortcuts.html
+++ b/doc/reference_keyboard_shortcuts.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_command_line.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Keyboard Shortcuts &ndash; Reference</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_thumbnails.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
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@@ -967,24 +965,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_command_line.html">Previous</a>
             </p>
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+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_thumbnails.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/reference_management.html b/doc/reference_management.html
index 8eca6b32..b50f3e2c 100644
--- a/doc/reference_management.html
+++ b/doc/reference_management.html
@@ -15,23 +15,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_thumbnails.html">Previous</a>
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+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Cache and Data Management &ndash; Reference</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="credits.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -264,24 +262,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_thumbnails.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="credits.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/reference_thumbnails.html b/doc/reference_thumbnails.html
index 6a0ccbc4..fd88e430 100644
--- a/doc/reference_thumbnails.html
+++ b/doc/reference_thumbnails.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_keyboard_shortcuts.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Thumbnails &ndash; Reference</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_management.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -87,24 +85,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="reference_keyboard_shortcuts.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="reference_management.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/sidebars.html b/doc/sidebars.html
index ba3d19c4..8debe69e 100644
--- a/doc/sidebars.html
+++ b/doc/sidebars.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="collections.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Sidebars</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars_exif.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -59,24 +57,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="collections.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars_exif.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/sidebars_exif.html b/doc/sidebars_exif.html
index 4686f426..9ccc4ed6 100644
--- a/doc/sidebars_exif.html
+++ b/doc/sidebars_exif.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">EXIF &ndash; Sidebars</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars_sort_manager.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -71,24 +69,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars_sort_manager.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/sidebars_keywords.html b/doc/sidebars_keywords.html
index c7dd6de4..5eb95ba8 100644
--- a/doc/sidebars_keywords.html
+++ b/doc/sidebars_keywords.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars_sort_manager.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Keywords &ndash; Sidebar</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_presentation.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -98,24 +96,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars_sort_manager.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="image_presentation.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/sidebars_sort_manager.html b/doc/sidebars_sort_manager.html
index ca222454..60a9921b 100644
--- a/doc/sidebars_sort_manager.html
+++ b/doc/sidebars_sort_manager.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars_exif.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Sort Manager &ndash; Sidebars</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars_keywords.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -119,24 +117,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="sidebars_exif.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="sidebars_keywords.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>
diff --git a/doc/style.css b/doc/style.css
index ac901000..282c45fa 100644
--- a/doc/style.css
+++ b/doc/style.css
@@ -27,7 +27,7 @@ p.next {
 div.navtop {
 	text-align: center
 }
-
+	
 div.navbottom {
 	text-align: center
 }
@@ -60,6 +60,7 @@ hr#bottomseparator {
 div.bottomspacer {
 	margin-bottom: 5em;
 }
+
 div.footer {
 	text-align: right
 }
@@ -157,7 +158,7 @@ div.gq-search-4 {text-align: center}
 /* index.html */
 .menu ul {font-size: 110%; font-weight: bold; margin: 10px;}
 .menu ul li {margin: 4px;}
-.menu ul>ul {font-size: 90%; font-weight: normal}
+.menu ul li ul {font-size: 90%; font-weight: normal}
 
 /* introduction.html */
 span.gq-introduction-6 {font-family: Nimbus Roman No9 L}
diff --git a/doc/template.html b/doc/template.html
index e2f184e4..b404b857 100644
--- a/doc/template.html
+++ b/doc/template.html
@@ -17,23 +17,21 @@
       <col id="navtop_col2" width="33%"></col>
       <col id="navtop_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="previous.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navtop_title">Chapter &ndash; Subchapter</p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="next.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
     </table>
   </div>
 
@@ -47,24 +45,22 @@
       <col id="navbottom_col2" width="33%"></col>
       <col id="navbottom_col3" width="33%"></col>
 
-      <thead>
         <tr>
-          <td>
+          <th>
             <p class="previous"><a href="previous.html">Previous</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="navbottom_title"><a href="index.html">Contents</a>
             </p>
-          </td>
+          </th>
 
-          <td>
+          <th>
             <p class="next"><a href="next.html">Next</a>
             </p>
-          </td>
+          </th>
         </tr>
-      </thead>
 
     </table>
   </div>