html, body, #container {

    width: 100%;

    height: 100%;

    margin: 0;

    padding: 0;

}

anychart.onDocumentReady(function () {

    var chart = anychart.line([6, 10, 18, 11, 9]);

    chart.yScale().minimum(0);

    chart.xScale("linear");

​

    var controller = chart.annotations();

​

    var annotation = controller.rectangle();

    annotation.xAnchor(1.9);

    annotation.valueAnchor(17.5);

    annotation.secondXAnchor(2.1);

    annotation.secondValueAnchor(18.5);

​

    // Set hover fill.

    annotation.hoverFill(["#FEFEFE", "#424242"], 0.6, 0.5, null, 0.8, 0.9, 0.31);

​

    chart.title("Set hover fill as a radial gradient.");

    chart.container("container");

    chart.draw();

});