I have a a4j:commandButton that, when clicked and processing is successful, will return flow to a calling page. If I click the button many times, the target action gets called many times, but it throws an exception after the first click (presumably because the flow has ended) and returns to the page, but with all form fields empty. Clicking the button again then throws a :

Code:
java.lang.IllegalArgumentException: An id is required to lookup a FlowDefinition
Is there an easy way, while using the a4j_commandButton control, to disregard double submits?

Thanks