当我使用 jquery ajax 函数 .load() 时，此插件不起作用。如何解决这个问题？这是我的 .php 代码：

<script src="../Chart.js"></script>
<script type="text/javascript" src="../functions.js"></script>
<script src="../jquery-2.1.4.js"></script>
<link rel="stylesheet" href="../jquery-ui.min.css">
<script src="../external/jquery/jquery.js"></script>
<script src="../jquery-ui.min.js"></script>
<canvas id="canvas" width="400" height="400"></canvas>

And this is my functions.js:
jQuery(document).ready(function() {
var randomScalingFactor = function(){ return Math.round(Math.random()*100)};
    var lineChartData = {
      labels : ["January","February","March","April","May","June","July"],
      datasets : [
        {
          label: "My First dataset",
          fillColor : "rgba(220,220,220,0.2)",
          strokeColor : "rgba(220,220,220,1)",
          pointColor : "rgba(220,220,220,1)",
          pointStrokeColor : "#fff",
          pointHighlightFill : "#fff",
          pointHighlightStroke : "rgba(220,220,220,1)",
          data : [randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor()]
        },
        {
          label: "My Second dataset",
          fillColor : "rgba(151,187,205,0.2)",
          strokeColor : "rgba(151,187,205,1)",
          pointColor : "rgba(151,187,205,1)",
          pointStrokeColor : "#fff",
          pointHighlightFill : "#fff",
          pointHighlightStroke : "rgba(151,187,205,1)",
          data : [randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor()]
        }
      ]

    }

  window.onload = function(){
    var ctx = document.getElementById("canvas").getContext("2d");
    window.myLine = new Chart(ctx).Line(lineChartData, {
      responsive: true
    });
  }
});

为什么它不起作用？此代码来自此插件包中的示例！那么它怎么可能不起作用呢？我认为这是因为使用了 jquery 中的 AJAX 函数 .load()。如何解决这个问题？请帮忙。