function uploadFile(file, status) {
        // prepare XMLHttpRequest
        var xhr = new XMLHttpRequest();
        xhr.open('POST', destinationUrl.value);
        xhr.onload = function() {
            result.innerHTML += this.responseText;
            handleComplete(file.size);
        };

        var formData = new FormData();
        formData.append('plz', "20099");
        xhr.send(formData);