onchange="submit()" immediate="true" does not work

[Deniz Gol]

Hello, i can't set my selectonemenu to submit immediately. here is the code:

<h:selectOneMenu value="#{a.avalue}" onchange="submit()" immediate="true">
                        <f:selectItems value="#{b.bvalue}" var="k" itemLabel="#{k.asdad}"
                                       itemValue="#{k.asdad}"/>
                    </h:selectOneMenu>
<h:inputText id="sada" value="#{c.cvalue}" required="true"
                                 requiredMessage="*asdadadadasd"
                                 validatorMessage="*asdsadadadadad">
                        <f:validateLength maximum="80"/>
                    </h:inputText>

when i change selectonemenu value, validators still working how can i deny that ?