JSF a4j:support with h:selectManyCheckbox

I'm having trouble with a JSF selectManyCheckbox and A4J support. The purpose is to run some action when a checkbox is selected. This works perfectly in Firefox. Yet, when testing in any IE (ie6 / ie7 / ie8), found out that the action was being called but the selected value was put to null. Just to test it, I placed a JSF commandButton to submit the form and to check the value that was selected and it was correct. So the problem is really in the ajax action (without submiting the form). Here is my code:

        <h:selectManyCheckbox id="supportCategoryCardFilter" value="#{cardListProvider.categoriesHolder.selectedCategories}"  layout="pageDirection" required="false" >
            <f:sel开发者_StackOverflow中文版ectItems value="#{cardListProvider.categoriesList}" />
            <a:support ajaxSingle="true" status="statusSearchCard" id="supportCategoryCardFilter2" event="onclick" reRender="cardsHolder, renderCardsCategoriesPanel" 
                 action="#{cardListProvider.findCards(cardListProvider.categoriesHolder.selectedCategories)}"  >
            </a:support>
        </h:selectManyCheckbox>

where cardListProvider.categoriesList is a List<SelectItem> and cardListProvider.categoriesHolder.selectedCategories is a List<String>

Has anyone had this problem? Can anyone help me with this? Thank you

You should use either JBoss EL, or declare a JSF function. If you are using facelets, this is as easy as:

<function>
    <function-name>concat</function-name>
    <function-class>com.mycompany.myproject.ServiceFunctions</function-class>
    <function-signature>java.lang.String concat(java.lang.String, java.lang.String)   </function-signature>
</function>

I am surprised this even works in Firefox. Action methods don't support parameters. From the Richfaces docs:

signature must match java.lang.Object action()

http://livedemo.exadel.com/richfaces-demo/richfaces/support.jsf?tab=info&cid=1615759