html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

 .custom-tooltip {

    visibility: hidden;

    pointer-events: none;

    position: absolute;

    width: 100px;

    padding: 4px;

    border: solid black 2px;

    background: #fff;

}

anychart.onDocumentReady(function () {

​

    // the data used in this sample can be obtained from the CDN

    // https://cdn.anychart.com/csv-data/csco-daily.js

    // create a data table using this data

    var dataTable = anychart.data.table();

    dataTable.addData(get_csco_daily_short_data());

​

    // map the data

    var mapping = dataTable.mapAs({value: 4});

​

    // create a stock chart

    var chart = anychart.stock();

​

    // create a plot on the chart

    var plot = chart.plot(0);

​

    // create a line series

    plot.line(mapping).name("CSCO");

​

    // add event markers

    plot.eventMarkers({"groups": [

      {

        "data": [

          {

            "date": "2006-06-08",

            "description": "Audium Corporation Acquisition"

          },

          {

            "date": "2008-04-27",

            "description": "PostPath Acquisition"

          }

        ]

      }

    ]});

​

    // disable the built-in tooltips of event markers

    var eventMarker = plot.eventMarkers();

    eventMarker.tooltip(false);

​

    var tooltip = document.getElementById("tooltip");

​

    /* show a custom tooltip

    when the mouse is over a marker */

    eventMarker.listen("eventMarkerMouseOver", function(e) {

​

      // show the tooltip

      tooltip.style.visibility = "visible"; 

​

      // set the text of the tooltip

      tooltip.innerHTML = e.eventMarker.description;

    });

​

    /* hide the custom tooltip

    when the mouse is out of a marker */

    eventMarker.listen("eventMarkerMouseOut", function() {

      tooltip.style.visibility = "hidden";

    });

​

    // set the position of custom tooltips

    chart.listen("mouseMove", function(e) {

      var clientX = e["offsetX"];

      var clientY = e["offsetY"];

      tooltip.style.left = clientX + 20 + "px";

      tooltip.style.top = clientY + 10 + "px";

      tooltip.style.zIndex = 10000;

      tooltip.style.border = "solid black 2px";

    });

​

    // set the chart title

    chart.title("Event Markers: Custom HTML Tooltips");

​

    // set the container id

    chart.container("container");

​

    // initiate drawing the chart

    chart.draw();

});