next and previous links fixed up
diff --git a/user_guide/libraries/validation.html b/user_guide/libraries/validation.html
index 0f8b141..f4beb56 100644
--- a/user_guide/libraries/validation.html
+++ b/user_guide/libraries/validation.html
@@ -709,7 +709,7 @@
<div id="footer">
<p>
-Previous Topic: <a href="uri.html">URI Class</a>
+Previous Topic: <a href="user_agent.html">User Agent Class</a>
·
<a href="#top">Top of Page</a> ·
<a href="../index.html">User Guide Home</a> ·