ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<div id="container" style="height: 400px; width: 500px"></div>

JavaScript

var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        type: 'pie'
    },
    
    plotOptions: {
        pie: {
            point: {
                events: {
                    click: function(){
                        console.log(this);
                        alert(this.y)
                    }
                }
            }
        }
    },
    
    series: [{
        data: [29.7, 71.5, 106.4, 129.2]
    }]
});