title: Highcharts : Chart with drilldown how to obtain click event of drill up button
body: <p>I am using Highcharts wtih drilldown and here is my working <a href="http://jsfiddle.net/phpdeveloperrahul/Dg33R/" rel="noreferrer">FIDDLE</a>.</p>
  
  <p><strong>How can I get the click event of the drill up button ?</strong> I have referred the <a href="http://api.highcharts.com/highcharts#Chart.drillUp" rel="noreferrer">Highcharts API</a>
  but can't figure out how can I incorporate this into my code.</p>
  
  <p>I want to do something like:</p>
  
  <pre><code>drillUp: function(){
       //get point details by using something like this or this.point
       //get series details by using something like point.series
  }
  </code></pre>