$(".Ulozit_upraveny_produkt").click(function() {
            event.preventDefault();
            var pridat_id = $(this).attr('data-produkt-id');

            var form_product = $("#productEdit").serializeArray();
            var files = document.getElementById("file_upload").files;
            var formData = new FormData();

                form_product.forEach(function(item) {
                    formData.append(item.name, item.value);
                });


            for (var i = 0; i < files.length; i++) {
                var file = files[i];


                // Add the file to the request.
                formData.append('image[]', file, file.name);
            }
            var xhr = new XMLHttpRequest();
            xhr.open('POST', './library/editProdukty.php', true);
            xhr.onload = function() {
                if (xhr.status === 200) {
                    // File(s) uploaded.
                    //uploadButton.innerHTML = 'Upload';
                } else {
                    alert('Stala se chyba!');
                }
            };

            xhr.send(formData);
            xhr.onreadystatechange = function()
            {
                if (xhr.readyState == 4 && xhr.status == 200)
                {
                    console.log(xhr.responseText);
                }
            }


        });