html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.area();

​

    var series = chart.rangeSplineArea([

        {x: 'Meat', high: 12, low: -10},

        {x: 'Fruit', high: 2, low: 11},

        {x: 'Nuts', high: 20, low: -10},

        {x: 'Milk', high: 2, low: 11},

        {x: 'Fish', high: 11, low: -9}

    ]);

​

    // Set high fill.

    series.highFill(function () {

        return 'rgba(100,' + (50 * (this.index + 1) - 10) + ', 248, 0.6)';

    });

​

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

    chart.container('container');

    chart.draw();

});