Hello i have a problem.  When i change the value of scheduleFrequency selectOneListbox it causes validation to be fired. I then show/hide the selectManyCheckbox.   The show/hide does not happen when there is a validation error. I have a @NotNull annotaion on the scheduleBean.scheduleMetaDataDTO.scheduleFrequency.  When i select the null option i need it to hide the selectManyCheckbox even if a validation error is thrown.  Is there a way to disable validation for the ajax call only?  Below is the section of code

                    <h:panelGrid columns="2" rendered="#{scheduleBean.scheduleMetaDataDTO.scheduleTypeReccuring}">
                             <h:selectOneListbox value="#{scheduleBean.scheduleMetaDataDTO.scheduleFrequency}"
                                size="1" id="scheduleFrequency">
                                <f:selectItem itemValue="#{null}" itemLabel="Select..." />
                                <f:selectItems value="#{scheduleBean.scheduleFrequencies}" />
                                <a4j:ajax event="change" render="dailyCheckboxes" execute="@this"/>
                            </h:selectOneListbox>
                            <a4j:outputPanel id="dailyCheckboxes">
                                <h:selectManyCheckbox value="#{scheduleBean.scheduleMetaDataDTO.selectedDays}"
                                    rendered="#{scheduleBean.showDaysCheckboxes}"
                                    layout="lineDirection">
                                    <f:selectItems value="#{scheduleBean.days}" />
                                </h:selectManyCheckbox>
                            </a4j:outputPanel>
                        </h:panelGrid>