anychart.onDocumentReady(function() {
var chart = anychart.surface(getData());
var zGrid = chart.zGrid();
zGrid.stroke({color: '#3a5fcd', thickness: 2, dash: '5 2 5'});
chart.zAxis({title: 'Z-axis'});
chart.xAxis(false).yAxis(false);
chart.title('Get and modify zGrid');
chart.container('container');