One more try.
diff --git a/documentation/contents/index.html b/documentation/contents/index.html
index 21b1442..9a15de4 100644
--- a/documentation/contents/index.html
+++ b/documentation/contents/index.html
@@ -1,3 +1,4 @@
+<div id="maincontent">
<div class="navheader">
<table summary="Navigation header" width="100%">
<tr>
@@ -436,4 +437,5 @@
<td valign="top" align="left" width="40%"> </td><td align="center" width="20%"> </td><td valign="top" align="right" width="40%"> Chapter 1. Introduction</td>
</tr>
</table>
+</div>
</div>
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