$(function(){
    var form = $('#send');
    var formMessages = $('#result');
    $(form).submit(function(e){
    $('#btnSubmit').attr('disabled', true);
      e.preventDefault();
      $.ajax({
        type: 'POST',
        url: 'send.php',
        data: new FormData(document.forms['send']),
        contentType: false,
        processData: false,
      })
        .done(function(response){
            $(formMessages).html(response);
            document.getElementById('privacy').checked = false;
            $('#comment').val('');
        });
        .fail(function(data){
            $(formMessages).html(data.responseText);
        });
    });
});