gistfile1.js

    jQuery.ajax({
        type: "PUT",
        url: "http://key:[email protected]:5984/staging/doc1",
        data: '{}',
        contentType: "application/json",
        success: function (data, textStatus, XMLHttpRequest) {
            alert("ok " + data);
        },
        error: function (XMLHttpRequest, textStatus, errorThrown) {
            alert("ko"); // {}, "error", undefined
        }
    });