Estoy usando lajQuery Validator. Y estoy tratando de averiguar: ¿Cómo puedo retirar el validador de mi formulario una vez enviado?

$(function() {
  // Just the rules, etc...
  validator = $("#sweepstakesForm").validate({rules: {fname: {required: true,minlength: 2,maxlength: 50},lname: {required: true,minlength: 2,maxlength: 50},email: {email: true,remote: "?c=home&m=jsHook&param=email&nojson=1",required: true,minlength: 6,maxlength: 120},address: {required: true,minlength: 5,maxlength: 100},state_0: {required: true},state:  ); // etc ...

  $('#sweepstakesForm').submit() {

  }
});

He intentado esto en vano:

validator = null;
$("#sweepstakesForm").unbind('validate');
delete validator;