anychart.onDocumentReady(function () {
var chart = anychart.waterfall([166, 43, -79, -46, 84, NaN]);
var horizontalGrid = chart.grid();
horizontalGrid.axis(chart.xAxis());
var verticalGrid = chart.grid(1);
verticalGrid.axis(chart.yAxis());
chart.title("Get and modify grid object");
chart.container("container");