<h:form>
    <h:inputText id="disabledinput" styleClass="disabled"
        value="#{someBean.property}"></h:inputText>
    <h:outputScript>
        $('.disabled').attr('disabled', 'disabled');
    </h:outputScript>
    <h:commandButton action="#{someBean.action}"
        onclick="$('.disabled').removeAttr('disabled'); return true;"
        value="Submit" />
</h:form>