html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

button {

    margin: 10px 0 0 10px;

}

var chart;

var controller;

var annotation;

anychart.onDocumentReady(function () {

    chart = anychart.line([

        {x: 0, value: 6},

        {x: 1, value: 10},

        {x: 2, value: 18},

        {x: 3, value: 11},

        {x: 4, value: 9}

    ]);

    chart.yScale().minimum(0);

    chart.xScale('linear');

​

    chart.annotations([{

        type: 'ellipse',

        xAnchor: 1.9,

        valueAnchor: 17,

        secondXAnchor: 2.1,

        secondValueAnchor: 19,

        fill: '#4CAF50 0.5',

        stroke: '3 #FF9800'

    }]);

​

    controller = chart.annotations();

​

    annotation = chart.annotations().getAnnotationAt(0);

​

    chart.title('Select/unselect methods');

    chart.width('100%').height('95%');

    chart.container('container');

    chart.draw();

});

​

function select() {

​

    // Set selection mode.

    controller.select(annotation);

}

​

function unselect() {

​

    // Disable selection mode.

    controller.unselect(annotation);

}