html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.pie([

        {x: 'Chrome', value: 8},

        {x: 'Firefox', value: 7},

        {x: 'Safari', value: 3},

        {x: 'IE', value: 2}

    ]);

​

    var outline = chart.hovered().outline();

​

    // Set fill.

    outline.fill(function () {

        return anychart.color.darken(this.sourceColor);

    });

​

    chart.title('Set outline fill parameter as a function');

    chart.container('container');

    chart.draw();

​

    chart.hover(0);

});