html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var data = [

        {x: "A", value: 20},

        {x: "B", value: 12},

        {x: "C", value: 17},

        {x: "A&B", value: 4},

        {x: "B&C", value: 5},

        {x: "A&C", value: 7},

        {x: "A&B&C", value: 1}

    ];

​

    var chart = anychart.venn(data);

​

    var intersections = chart.intersections();

​

    // Set stroke.

    intersections.stroke(function () {

        return "3 " + anychart.color.darken(this.sourceColor);

    });

​

    chart.title("Set stroke parameter as a function");

    chart.container("container");

    chart.draw();

});