How to avoid trigger acitonListener for other dorpdown lists

Greetings;
In a JSF page I have two h:selectOneMenu, each has a biniding to its own valueChangeListner.
The problem is when I change the value of the first dorpdown list it fires the valueChangeListener for the other dropdown list. I don't want to have this behaviour. I tried to solve the problem by making a requestScop paramter as a flag, this request scoped parameter is created only when the* first dropdown list * is changed,and in the valueChangeListener for the second dropdownlist , I check for this parameter to know if the post back is fired from the first dropdown list.
Is this the best way to avoid triggering the valueChangeListener.
Regards

Are you submitting the form on change of the dropdown?
At any way, the valueChangeListener will only be invoked if the currently submitted value is different from the initial value. That's all. If you're submitting the form during the onchange, then maybe you have in the 2nd dropdown null as initial value and empty string as 1st option value or so. Who knows. Just align it out. Empty string != null.

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How to avoid trigger acitonListener for other dorpdown lists

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