Java EE (Java Enterprise Edition) General Discussion

hi to all,
i have a big problem and i dont' know how to resolve it.
i'm working in a jsf project using netbeans, and
i have the necessity to implement a client side validation on top of jsf teconology.
i searched a lot for a good solution, but i have several problems: the first problem
that i found is that the netbeans visual editor do not allow that i insert manual jsp tag in jsf page,
reporting to me many errors and no more visualization on design page. I Have problem also how to use javascript
in a jsf page, for example how to retreive the value of a input text box from javascript.

Thanks a lot for Any help.... sry for my poor english :-)
Foscolo