Jquery email validation not validate email

I'm using Jquery validation and i tried to implement it, but it's not working on my side. How to fix this?

I create a new js file and I call this file with this

function add_email_validation(){
  wp_register_script( 'jqueryvalidate', get_template_directory_uri() . '/js/jquery.validate.min.js', array('jquery'));
  wp_enqueue_script('jqueryvalidate');
  wp_register_script( 'jqueryvalidate', get_template_directory_uri() . '/js/additional-methods.min.js', array('jquery'));
  wp_enqueue_script('additionalmethods');
  wp_register_script( 'email-validation', get_template_directory_uri() . '/js/email-validation.js', array('jquery'));
  wp_enqueue_script('email-validation');

Here's the link http://bit.ly/1O1QxmT

Script:

jQuery(document).ready(function($){
$('#subscription').validate({
    errorElement : 'span',
        errorLabelContainer: '.email_error',
        rules: {
            subscriptions: {
                        required: true,
                        email: true
                    }
            },
            messages: {
                subscriptions: {
                required: "Email is required",
                email: "Invalid email format"
                }
            }
    });
});