PrimeFaces already ships with jQuery bundled, yet you've downloaded and installed another one which would only conflict with PrimeFaces bundled jQuery. I'm sure that if you have paid a bit more attention and love to the webbrowser's builtin JavaScript console, you would have seen JS errors.
You need to remove the following line:
<script type="text/javascript" src="js/jquery-1.7.1.min.js"></script>
On pages which do not necessarily use PrimeFaces components, jQuery won't be automatically included, you'd then need to explicitly load its bundled jQuery by a proper <h:outputScript>.
<h:outputScript library="primefaces" name="jquery/jquery.js" />
Note that using <h:outputScript> does not end up in a duplicate script include on pages which actually use PrimeFaces components.