To call a bean function to set a property value with hx:ajaxRefreshRequest

I have an input box
I need to output some text onto an output box,When the input box value changes
I am using Ibm jsf implementation and RSA 7.0,JSF 1.1 implementation
I know how to call a bean property's setter method using this hx:refresh submit and associated behaviours and target actions.
As explained in this tutorial
http://www.ibm.com/developerworks/rational/library/06/1205_kats_rad2/
But my aim is to call a bean function other than the setter method,because i could do some business logic there and give output.This is possible via setters too,but i believe thats a poor programming practice.
Hope ppl have got a clear picture of my problem.
Help me in this.

You can use any jsf implementation you want, I suggested you only the steps to accomplish the task but I don't know the components you are using...
You can also accomplish the task without Ajax at all using "classic" http requests but it will be very frustrating for your users...
Catch client side event (input value change) -> fire an action that update the model -> update presentation layer with up to date model values

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To call a bean function to set a property value with hx:ajaxRefreshRequest

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