var attZone = new FileDrop('fdzone');

// FileList is a simple array-like object
// with many useful File-related methods:
var activeUpload = new fd.FileList;
attZone.multiple(true);

attZone.event('send', function (files) {
    files.each(function (file) {

        file.event('done', function (xhr) {
            var resp = JSON.parse(xhr.response).d;

            CheckinArticleAttachment(resp).done(UpdateArticleAttachmentList());