I am using javascript to display a Google Visulization LineChart in my web application. How can I get it to display vertical gridlines? I've read about using chg to set them, but as far as I know that only applies when making the chart using the query string method. Could you tell me how to get verticle gridlines when initialising the LineChart as follows:
new google.visualization.LineChart(div.get(0)).draw(data, {
title: 'Unique visitors - Previous Month',
width: div.width(),
height: 330,
chartArea: {left:50, width:"90%"},
legend: 'none',
yAxis: {title: '(thousands)'}
});