$(document).ready(function () {
    var cf = $('.contact-form form');
    cf.submit(function (e) {
        e.preventDefault();
        $.ajax({
            url : '/contact',
            data : cf.serializeArray(),
            type : 'POST',
            success : function (data) {
                cf.hide();
                cf.after('<p class="thanks"><strong>Thank you!</strong> Your message has been delivered.</p>');
            },
            error : function (xhr) {
                alert(xhr.responseText);
            }
        });
    });
});