Sorry, do you mean the following ?
<a4j:jsFunction name="processAction" reRender="types" action="#{adminController.deleteType(type)}" > <f:param id="type" value="#{type}" /> </a4j:jsFunction>
yes.. and call it like processAction(#{someRowVarProperty}) to identify the row.
OK, thanks. Finally I understand it and the idea in general.