html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var dataSet = anychart.data.set([

        ["John", 10000, 12000],

        ["Jake", 12000, 15000],

        ["Peter", 18000, 16000],

        ["James", 11000, 13000],

        ["Mary", 9000, 19000]

    ]);

​

    var firstData = dataSet.mapAs({x: [0], value: [1]});

    var secondData = dataSet.mapAs({x: [0], value: [2]});

​

    var chart = anychart.column();

    chart.column(firstData).name("First series");

    chart.column(secondData).name("Second series");

​

    var tooltip = chart.tooltip();

    tooltip.displayMode("union");

    tooltip.title(false);

​

    // Set text formatter for union tooltip.

    tooltip.unionFormat(function () {

        return this.x;

    });

​

    chart.title("Set union text formatter parameter as a function");

    chart.container("container");

    chart.draw();

});