Open the new window by using window.open

I use the javascipt 'window.open' to open a new window. I pass the controller name (XXX.do) to the paramerter 'name'. When I want to pass a parameter to XXX.do, I can pass it like this.

name = "XXX.do?key=11"

However, is it possible to pass an internal table or a model class to the XXX.do by this way?

Moreover, I would like to another question for my knowledge. Everytime when I call this function 'window.open', how can the controller class be instantiated?