I need the way to intercept all ajax requests maded from page. So i need some wrapper to add my data to all users requests.
                
                A: 
                
                
              I dont think you can get this out of the box . 
What you need here is a little restructuring of your client side code [ You should have already done that , but it is never too late :) ] .
Make a function that has the responsibility of interacting with server . Use this to make ALL your server requests and get data . After that whenever you need to do something at a application level ( like maybe caching data to avoid server side trip ) you can do in this function . 
So something like 
xhr_request( url , callback_function, params ) ;
// where xhr_request is your custom function that takes care of server interaction .
                  NM
                   2010-07-08 11:08:25
                
              But i get it) You can look at it here: http://gist.github.com/469941
                  Creotiv
                   2010-07-10 06:07:40
                
                +1 
                A: 
                
                
              
            Huh... i made this work))) with help of this topic Extending an ActiveXObject in javascript i made script that intercept all ajax requests no matter what framework or browser do user use.
You can look at it here: Script
                  Creotiv
                   2010-07-09 19:46:42