在addEventListener提交仍然提交表单时返回false？

var form = document.forms[0]; 
form.addEventListener("submit", function(){
  var email = form.elements['answer_13829'].value;
  if( email == '[email protected]') {
     alert('redirecting the user...');
     window.location = 'xxxx';
     return false;
  }
});
var form = document.forms[0]; 
form.addEventLis