In order web telephone works correctly one should replace line 4

<script language="javascript" content-type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>

for one referring local jquery-1.4.2.js which is not used otherwise. Page is not working with line above.

I.e. it should be

<script language="javascript" content-type="text/javascript" src="jquery-1.4.2.js"></script>

Regards,
   Dmitry.