document.getElementById("cnvTheChart").onclick = function (evt) {
        if (theChart.config.type == "bar") {
            var activePoints = theChart.getElementAtEvent(evt);
            var theElement = theChart.config.data.datasets[activePoints[0]._datasetIndex].data[activePoints[0]._index];
            var theDataKeyClicked = theChart.config.data.datakeys[activePoints[0]._index];
            HandleChartDrillThrough(theDataKeyClicked);
        }
    }