Is it possible in jsf? Action with parameters????

I have a NavigationItem, a object of myfaces.....
And when is clicked it, I want to create a new pane, based on the navigationItem clicked, obviuosly,
How I can submit a action with parameters???
Is it possible?
thanks all !

I will try to explain better.
I create menus dynammicaly....
and this menus has NavigationMenuItems, all componentes of myFaces
The navigationMenuItem is inherited of SelectItem.....
and creating it dynamically I need to put a action, and the backing bean has a method that return a string , but the value returned is always null, and I will to know How things I will do depending the parameters (like request parameteres) are passed through the action...
but I do not know how to set the action dynamically, when the method setAction expect a string and not a MethodBinding.....
And how I will to know after, what navigationMenuItem was clicked ??
I don't know if are answers to this questions, I'm not sure about the limitations of web development and jsf, but I must to do it...
thanks

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