mui 跨域请求

<ul class="mui-table-view" style="margin-top: 25px;">
    <li class="mui-table-view-cell">
        <a id="about" class="mui-navigate-right">
            关于mui
        </a>
    </li>
</ul>

document.getElementById("about").addEventListener('tap', function() {
    fGetData();
});

需要严格按照下面的格式，请求的字段写在data里头，url后头需要加上?jsoncallback=?

function fGetData() { //请求数据
    alert('start get data');
    mui.ajax({
        type: "get",
        url: "http://115.28.18.116:8089/?jsoncallback=?",
        async: true,
        data: {
            cid: 3,
            key: 'Instant'
        },
        dataType: "jsonp",
        jsonp: "jsoncallback",
        timeout: 1000,
        success: function(data) {
            alert(data);
            var vData = JSON.stringify(data);
            alert(vData);
        },
        error: function(xhr, type, errorThrown) {
            plus.nativeUI.toast(errorThrown);
        }
    });
}

.