Richfaces4 javascript gets converted into jibberish on browser

[tchoesang]

text.xhtml

<h:form>

               <a4j:commandLink action="#{workspaceCrudController.cleanUp}"

                        oncomplete="#{rich:component('crudWorkspacePanel')}.hide();">

                        <img id="closeFilterWorkspace"

                            src="../resources/images/close.png"

                            style="cursor:pointer"

                            alt="#{i18n['closeDialogDesc']}"

                            title="#{i18n['closeDialogDesc']}" />

                </a4j:commandLink>

        </h:form>

test.jsf

<form id="j_idt505" name="j_idt505" method="post" action="/nymphaea/workspace/">

     <input type="hidden" name="j_idt505" value="j_idt505">

     <a href="#" id="j_idt505:j_idt506" name="j_idt505:j_idt506"

          onclick="RichFaces.ajax("j_idt505:j_idt506",event,{"incId":"1"} );return false;"    

          tabindex="-1" accesskey="">

      <img id="closeFilterWorkspace" src="../resources/images/close.png"

          style="cursor:pointer" alt="Klicken Sie hier um den Dialog zu schließen"          

          title="Klicken Sie hier um den Dialog zu schließen">

      </a>

</form>

I observed this change from richfaces4, that the javascript produced by richfaces is not understandable.

What does "incId":"1" mean? The only thing i understand here is, the id of the compnent and something happens on its default event.

Can somebody explain what is going on?