ADFFaces (JSF ADF) javascript events vs button actions

Hello,
I currently have a jspx with the following components:
af:selectOneChoice
Onclick=#{backing_bean.myDropdownMethod}
AutoSubmit=true
af:commandButton
Action=#{backing_bean.myButtonMethod}
af:inputText
Value=#{bindings.TransientVoSomeData.inputValue}
the Backing_bean class methods are as follows:
myDropdownMethod {
TransientVoRow.setAttribute("someData", "someValue"); // called in AM via OperationBinding
TransientVoRowIterator.execute();
myButtonMethod {
TransientVoRowIterator.execute();
Basically, the dropdown fires the onclick event when changed, and successfully calls the AM to populate the transient VO attribute with some value (i verified this in the debugger and the VOIterator row does hold the data). However, the af:inputText does not display the value at this point. I must click the button, which does exactly the same call, and ONLY THEN is the data in the VOIterator row displayed in the af:inputText on the page. Also, it seems that clicking the button also causes the dropdown's Onclick event to fire...don't know if this affects it.
Can anyone suggest an easy approach to causing the af:inputText to display the data directly after the onclick event, without having to refresh the page or invoke another event? Do I have to resort to AJAX, or can i survive with the built-in javascript events?
thanks

Try defining partial page rendering between your list and your textItem.
http://download.oracle.com/docs/html/B25947_01/web_complex004.htm#CEGBBGEG

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