[TYPO3-mvc] ExtJS, AJAX in Extbase

[Dawid Pacholczyk]

Hi List !!
  I just can`t do it. How can I run extjs and ajax in my extbase BE 
module ? I`m looking at workspace and othere exts and nothing.

For example what is pageRenderer ? I can`t find any declaration of this 
object and I still get some errors. Please gimme some good link where I 
can read about that.

best regards,
Dawid Pacholczyk