FineUIPro页面调用ajax请求

cydgz

Uncaught ReferenceError: $ is not defined
    at XXXXX.html:1678
代码
</form>
    <script src="scripts/echarts.min.js"></script>
     <script src="Scripts/jquery.signalR-2.2.0.min.js"></script>
    <script src="signalr/hubs"></script>
    <script src="scripts/DataProcess.js"></script>

        <script type="text/javascript">
          $(document).ready(function () {---这里报错误
                $.ajax({
                    type: "POST",
                    contentType: "application/json",