anychart.onDocumentReady(function () {
var dataSet = anychart.data.set([
{id: "AU.CT", value: 15, title: "Australian Capital Territory"},
{id: "AU.VI", value: 23, title: "Victoria"},
{id: "AU.WA", value: 86, title: "Western Australia"},
{id: "AU.QL", value: 16, title: "Queensland"},
{id: "AU.NS", value: 32, title: "New South Wales"},
{id: "AU.NT", value: 64, title: "Northern Territory"},
{id: "AU.TS", value: 28, title: "Tasmania"},
{id: "AU.SA", value: 45, title: "South Australian"}
var dataSetForSeries = dataSet.mapAs({id: "id"});
var map = anychart.map();
map.geoData(anychart.maps.australia);
var series = map.choropleth(dataSetForSeries);
series.selectStroke(function () {
return "2 " + anychart.color.darken(this.sourceColor);
map.title("Set select stroke parameter as a function");
map.container("container");