$(function() {

    // Setup form validation on the #register-form element
    $("#register_form").validate({

        // Specify the validation rules
        rules: {
            register_username: "required",
            register_password: "required",
            register_email: {
                required: true,
                register_email: true
            },
            register_confirm_password: {
                required: true,
                minlength: 5
            },
        },

        // Specify the validation error messages
        messages: {
            register_username: "Please enter your username",
            register_password: "Please enter your password",
            register_confirm_password: {
                required: "Please provide a password",
                minlength: "Your password must be at least 5 characters long"
            },
            register_email: "Please enter a valid email address",
        },

       submitHandler(function(form) {
            $.ajax({
              type: 'POST',
              url: $(this).attr('action'),
              data: $(this).serialize(),
              dataType : 'json',
              success(function(data) {
                if (data){
                    alert("success");
                    // $(this)[0].reset();
                }
              })
            });
            return false;
        });
    });

});

var_dump($_POST);

submitHandler(function(form) {
                $.ajax({
                  type: 'POST',
                  url: $(this).attr('action'),
                  data: $(this).serialize(),
                  dataType : 'json',
                  success(function(data) {
                    if (data){
                        alert("success");
                        // $(this)[0].reset();
                    }
                  })
                });
                return false;
            });
        });