SOS big problem with validation phase debugging

[Julien Martin]

Hello,
I have a form containing several fields and one of the fields prevents the validation of the form and the invoke application and update model values phases are never entered. My question is simple but I have not found any answer to it: how do I know which value is applied during the apply request values phase? I know my form does not pass validation because I see it in the console (I have implemented a phase listener). My second question is as follows: how do I bypass validations altogether for a specific form control?
Note that I use jsp and j2ee 1.4 so I can't use jsf 1.2.
Thanks in advance,
Julien Martin.