html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.scatter();

    chart.line([

        {x: 0, value: 20},

        {x: 1, value: 50},

        {x: 2, value: 30},

        {x: 3, value: 90},

        {x: 4, value: 40}

    ]);

    chart.xAxis(1, {orientation: "top", title: "Second x-axis"});

​

    var crosshair = chart.crosshair();

    crosshair.enabled(true);

​

    var crosshairXLabel = crosshair.xLabel();

​

    // Set axis index.

    crosshairXLabel.axisIndex(1);

​

    chart.title("Set axis index");

    chart.container("container");

    chart.draw();

});