Java and xhtml

[evelyne24 at gmail.com]

Hello,

How can I get in java the value of an input build with apache.ecs.xhtml? I searched an hour or so on google and haven't found anything related to that. 
E.g:
 input hidden_input = new input();
 input.setID(prefix + name);
 ...
and at a certain moment its value changes (with javascript). Then I need its value in java. Maybe there is a way to get it using xwiki api somehow...

I would be very thankful for an answer. Thank you very much.

Evelina