html, body {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

button {

    margin: 10px 0 0 10px;

}

#container {

    position: absolute;

    width: 100%;

    top: 35px;

    bottom: 0;

}

anychart.onDocumentReady(function () {

    // create data

    var data = [

      {name:     "Slavic Languages", children: [

        {name:   "East Slavic", children: [

          {name: "Russian",        value: 150000000},

          {name: "Ukrainian",      value:  45000000},

          {name: "Belarusian",     value:   3200000}

        ]},

        {name:   "West Slavic", children: [

          {name: "Polish",         value:  55000000},

          {name: "Czech",          value:  10600000},

          {name: "Slovak",         value:   5200000}

        ]},

        {name:   "South Slavic", children: [

          {name: "Serbo-Croatian", value:  21000000},

          {name: "Bulgarian",      value:   9000000},

          {name: "Slovene",        value:   2500000},

          {name: "Macedonian",     value:   1400000}

        ]}  

      ]} 

    ];

​

    // create a chart and set the data

    chart = anychart.treeMap(data, "as-tree");

​

    // set the maximum depth of levels shown

    chart.maxDepth(3);

​

    // configure the text of headers in the hovered state

    chart.hovered().headers().format("{%value}");

​

    // configure the font of headers

    chart.normal().headers().fontColor("#990000");

    chart.normal().headers().fontSize("14");

    chart.normal().headers().fontWeight('bold');

    chart.hovered().headers().fontColor("#000099");

​

    // set the chart title

    chart.title().useHtml(true);

    chart.title("Treemap: Headers<br><br>" +

                "<span style='font-size:12; font-style:italic'>" +

                "Slavic Languages by Number of Speakers</span>");

​

    // set the container id

    chart.container("container");

​

    // initiate drawing the chart

    chart.draw();

});

// enable / disable headers

function headersEnabled(enabled) {

  chart.headers(enabled);

}