Highcharts - show every other x-axis category

Question

I have Highcharts set up to display a graph with a bunch of xAxis categories. This is all working fine, but I would like to be able to skip some of the xAxis categories, so not everything one is shown. You can see an example of this working within Campaign Monitor's reporting section (screenshot: http://screencast.com/t/Y2FjNzQ4Y).

Any idea how I can achieve this same layout?

Answer 1

    xAxis: {
        categories: categoriesname,
        labels: {
            style: {
                color: '#000',
                font: '9px Trebuchet MS, Verdana, sans-serif'
            }
        },
        **tickInterval: TickInterval,**// SET THIS
        tickPixelInterval: 80,
        tickmarkPlacement: 'on'
    },

Answer 2

It seems like the xAxis:labels:step value is what should be used to accomplish this:

        xAxis: {
            categories: ['JAN', 'FEB', 'MAR', 'APR', 'MAY'],
            labels:{
                step: 2 // this will show every second label
            }
        },

Step Axis Labels

Super late, but I figure this can help someone out.