google visualization line chart remove horizontal grid lines

Question

How do I remove the horizontal grid lines in a Google visualization line chart? I have already tried setting

minorGridlines: {count: 0 }, gridlines: {count: 0 } 

on both hAxis and vAxis.

Here is a jsfiddle of my chart.

http://jsfiddle.net/martlark/2XBhc/

Answer 1

Set the vAxis.gridlines.color option to "transparent" to make them disappear:

vAxis: {
    gridlines: {
        color: 'transparent'
    }
}

This doesn't work for the charts when displayed in IE < 9 (as those versions use VML instead of SVG, and the chart's don't support transparency in VML). In this case, you will need to set the gridline color to match the background color of the chart.