jQuery validation ignores placeholder!

jQuery validation ignores placeholder!

Hello.


I am using jQuery validation plugin to validate my form, but it is seems to ignore required fields witch have placeholder text. 


How to solve it? 




To display placeholders in all browsers I am using this jQuery plugin - http://formalize.me/


And to validate my form, I am using this code :


  1.     $("#userRegistration").validate({
  2.     errorLabelContainer: "#messageBox",
  3.     wrapper: "li",
  4.     rules: {
  5.         email: "required",
  6.         password: "required",
  7.         password_again: {
  8.         equalTo: "#password"
  9.         }
  10.       }
  11.     });
Field witch have placeholder is - Email.