html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var stage = anychart.graphics.create('container');

    var data1 = [

            {

              "x": "Category 1",

              "value": 4.3

            },

            {

              "x": "Category 2",

              "value": 2.5

            },

            {

              "x": "Category 3",

              "value": 3.5

            },

            {

              "x": "Category 4",

              "value": 4.5

            }

     ];

    var data2 = [

            {

              "x": "Category 1",

              "value": 2.4

            },

            {

              "x": "Category 2",

              "value": 4.4000000000000004

            },

            {

              "x": "Category 3",

              "value": 1.8

            },

            {

              "x": "Category 4",

              "value": 2.8

            }

          ];

    var data3 = [

            {

              "x": "Category 1",

              "value": 2

            },

            {

              "x": "Category 2",

              "value": 2

            },

            {

              "x": "Category 3",

              "value": 3

            },

            {

              "x": "Category 4",

              "value": 5

            }

          ];

​

    var chart1 = anychart.column();

    var xScale = anychart.scales.ordinal();

    var xAxis = chart1.xAxis();

    xAxis.scale(xScale);

    xAxis.orientation('bottom');

    var yScale = anychart.scales.linear();

    var yAxis = chart1.yAxis();

    yScale.stackMode('percent');

    yScale.stackDirection('reverse');  // commenting out this line, the stack direction is the same

    yAxis.scale(yScale);

    yAxis.orientation('left');

    var series1 = chart1.column(data1);

    series1.xScale(xScale);

    series1.yScale(yScale);

    var series2 = chart1.column(data2);

    series2.xScale(xScale);

    series2.yScale(yScale);

    var series3 = chart1.column(data3);

    series3.xScale(xScale);

    series3.yScale(yScale);

​

    chart1.bounds(0, 0, '50%', '100%');

    chart1.container(stage);

    chart1.draw();

});