Processing modal in JSF

How can I achieve the processing modal in JSF
Is there any build in tag for processing modal
can u plz provide me the solution,How to achieve the processing modal in JSF 2.0

Use Javascript on commandButton onclick on onmousedown event.
<h:form>
<h:inputText id="someId" size="30"
                    value="#{backingBean.inputValue}" />
...<h:commandButton value="#{msgs['view.add.delete']}"
                              action="#{backingBean.clickButton}" onclick="return window.confirm('Are you sure you want to do this?')"/>
</h:form>

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    Is it possible bypassed the error message "unable to process the request because a modal dialog or alert is active."
    I want to apply the following command from a window,
    "leTableau.label leNomDuTableau = / / label of the table
    Thank you for your idea
    Bonjour,
    Est-il possible de contourné le message d'erreur "impossible de traiter la requête, car une boîte de dialogue modale ou une alert est active."
    je veux applique la commande suivent d'une fenêtre,
    "leTableau.label = leNomDuTableau; // label du tableau
    Merci pour vos idée

    I have to rebuild my dialogue, he spends all attravaire!
    Je dois reconstruire mon dialogue, il passe attravaire tous!!

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