以下Java脚本函数不适用于jcanvas图表

<script type="text/javascript">
        window.onload = function () {
            debugger;
            $.ajax({
                type: "POST",
                url: "RMDashboard.aspx/get_dept_pend_fin_wo",
                data: "{}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess,
                failure: function (response) {
                    alert(response.d);
                }
            });
            function OnSuccess(response) {
                    //alert(response.d)                 
                var chart = new CanvasJS.Chart("ccpevman", {
                    title: {
                        text: ""
                    },
                    axisX: {
                        interval: 3,
                        intervalType: "month",
                    },
                    data: [{
                        type: "spline",
                        dataPoints: [  jQuery.parseJSON(response.d) ]
                    }]
                });
                chart.render();

            }
        }
</script>
<script type="text/javascript">
        window.