difficulties in jsp and test field in javascript language

Question

hi to all;

I'm debutante  in JSP netbeans, please help me to realize my application I have some difficulties:

1 - page modifier.jsp (recovery fields to edit it works well but I press button update nothing is changed.) 

2-how iserer date in  oracle 10g database via JSP netbeans.

3-how to connect with the selection of the space to be connected (the connection it works well but I have three spaces and each user has a private space to connect)

4-field test in javascript:

how to check that the field in a number  (number of telephone  for ewemple )

-check a field is already inserted in the database and must be given change.

Please help me if you have one reponse of these questions please 

thank you in advance