Highcharts Demo with superscript title

HTML

<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="https://rawgithub.com/highslide-software/7767462/raw/d7217cbf3e68d595f52f3af65b9e13fd967fde86/exporting-with-html.src.js"></script>

<div id="container" style="height: 400px; margin-top: 1em"></div>

JavaScript

$(function () {
    $('#container').highcharts({
        title: {
            useHTML:true,
            text: '10<sup>6 </sup> m<sup>3</sup>'
        },
        credits: {
            enabled: false
        },

        xAxis: {
            categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
        },

        series: [{
            data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
        }],

        exporting: {
            enabled: true,
            allowHTML: true
        }

    });
});