html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.gauges.linear([15, 20, 25, 30, 44]);

​

    var barPointer = chart.bar(2);

​

    // Set pointer stroke.

    barPointer.stroke(function () {

        return anychart.color.setThickness(anychart.color.darken(this.sourceColor), 3);

    });

​

    chart.width(600).height(400);

    chart.title('Set pointer stroke parameter as a function');

    chart.container('container');

    chart.draw();

});