$(document).ready(function(){
    var EmailObj=$('#newsletter-email');
    $("#newsletter-form form").validate({
        submitHandler: function(form) {
           EmailObj.css('color','#1fa22e');
           form.submit();
        },
        invalidHandler: function(form, validator) {
            EmailObj.val('Invalid Email!');
            EmailObj.css('color','#f00');
        }
    });

});