title: Uncaught TypeError: Cannot read property 'mouseIsDown' of undefined
body: <p>I am getting an error in console when I try to reload the chart on click of a button. Cant figure out why.</p>
  
  <pre><code>Uncaught TypeError: Cannot read property 'mouseIsDown' of undefined
  </code></pre>
  
  <p>I have created a jsfiddle for the same. The first click will draw the chart and on second click although it redraws the chart but there is a error in console.</p>
  
  <p>Note: JSFiddle is just to replicate the situation I am facing.</p>
  
  <p><a href="http://jsfiddle.net/fakhruddin/xpy0Lbma/4/">http://jsfiddle.net/fakhruddin/xpy0Lbma/4/</a></p>