Hi Guys,

How do I not allow the user click more than once in an a4j: commandButton?

I tried this:

<a4j:commandButton id="btnProg"

          action="#"

          image="../../images/add.png"

          styleClass="tdBtn"

          style="width:65;height:18;cursor:hand">

          <a4j:support event="onclick"

                    action="#{cvView.addProg}"

                    oncomplete="#{messageView.onComplete}"

                    reRender="pnlError,pnlAlert,pnlException,idPanelFormDados,

                    idPanelForm,idladoDireito,idDtExp,idDtForm,idDtCurso,idDtIdioma,

                    idDtCert,idPanelUploadEsq,idPanelUploadDir"/>

</a4j:commandButton>

But not work.