title: How to make series in HighCharts change Dynamically using Javascript and not Jquery
body: <p>I have searched all over the Stack Overflow Website and can't find a Perfect Solution. So someone who is good at HighCharts can help me out.
  Any answers will be Appreciated.....Please answer in Javascript and not Jquery....
      Generally I am creating empty variables in Series according to my usage.But I want them to be created dynamically when I add name and data in JSON file... I will attach my JSON File below...So please check it out...</p>
  
  <pre><code>var i = 1,
              chart;
          $(function () {
              chart = Highcharts.chart('container', {
                  chart: {
                      type: 'bar'
                  },
                  title: {
                      text: ''
                  },
                  subtitle: {
                      text: "This is a sample"
                  },
                  xAxis: {
                      categories: ['Physics', 'Chemistry', 'Maths', 'Science', 'Telugu', 'English']
                  },
                  yAxis: {
                      title: {
                          text: 'Marks'
                      }
                  },
                  series: [
                      {
                          name: "",
                          data: []
                      },
                      {
                          name: "",
                          data: []
                      },
                      {
                          name: "",
                          data: []
                      }
                  ]
              });
          });
  
  This is my json and when ever I add some name and data I want Series in Chart to add it....
  
  
  
          {
      "title":"My first chart",
      "dataa": 
      [
          {
              "name": "Unit Test 1",
              "data":[1,13,15,17,40,50,80]
          },
          {
              "name": "Unit Test 2",
              "data":[2,20,50,40,20,50,15]
          },
          {
              "name": "Unit Test 3",
              "data":[3,50,40,10,30,40,25]
          }
      ],
  
      "heading" :[  
      {
          "text":"S.No"
      },
      {
          "text":"Phy"
      },
      {
          "text":"Che"
      },
      {
          "text":"Mat"
      },
      {
          "text":"Sci"
      },
      {
          "text":"Tel"
      },
      {
          "text":"Eng"
      }
      ]  
  }
  </code></pre>