ElementStacks

HTML

<script src="http://highcharts.com/js/testing.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<div id="container" style="height: 400px; width: 500px"></div>
<button>toggle stacking</button>

JavaScript

window.chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container',
        type: 'column'
    },
    plotOptions: {
        series: {
            stacking: 'normal'
        }
    },
    tooltip: {
                pointFormat: '<span style="color:{series.color}">{series.name}</span>: <b>{point.y}</b> ({point.percentage:.0f}%)<br/>',
                shared: true
            },
    series: [{
        stack: 0,
        data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0]
    }, {
        stack: 0,
        data: [135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
    }]
},function(chart){
    
    $('button').click(function(){
        chart.series[0].options.stacking = 'percent';
        chart.series[0].hide();
        chart.series[0].show();
    })
    
});