gistfile1.js

require(['jquery'], function($) {
    var data,
        form = $('#queue-download-form'),
        url = queueDownloadForm.attr('action');

    form.on('submit', function(event) {
        event.preventDefault();

        // for JSON
        data = JSON.stringify(form.serializeArray());
        // for URLEncoded, remove `contentType`
        // data = form.serialize();

        $.ajax({
            url: url,
            data: data,
            type: 'POST',
            contentType: 'application/json',
            beforeSend: function(xhr) {
                // show a little dialog that it is sending or something
            },
            success: function(resp) {
                // hide the loading dialog
            },
            error: function(xhr, status, err) {

            }
        });
    });
});