add link

Author: aoberoi

sample/Archiving/README.md

@@ -133,7 +133,7 @@ as part of the URL, so the `request.params("archiveId")` expression is used to r
 Now you have understood the three main routes that are used to create the Host experience of
 creating an archive. Much of the functionality is done in the client with JavaScript. That code can
 be found in the `public/js/host.js` file. Read about the
-[OpenTok.js JavaScript]() library to learn more.
+[OpenTok.js JavaScript](http://tokbox.com/opentok/libraries/client/js/) library to learn more.
 
 ### Creating Archives - Participant View