ElementStacks

HTML

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

JavaScript

var categoryLinks = {
    'Foo': 'http://www.google.com/search?q=foo',
    'Bar': 'http://www.google.com/search?q=foo+bar',
    'Foobar': 'http://www.google.com/serach?q=foobar'
};

var chart = new Highcharts.Chart({
    chart: {
        renderTo: 'container'
    },
    
    xAxis: {
        categories: ['Foo', 'Bar', 'Foobar'],
        
        labels: {
            formatter: function() {
                return '<a href="'+ categoryLinks[this.value] +'">'+
                    this.value +'</a>';
            }
        }
    },
    
    series: [{
        data: [29.9, 71.5, 106.4]        
    }]
});
$('#container').click(function(event){
    event.preventDefault();
    var target=$(target);
    if(target.is('a'))
    {
        alert('clicked');
    }
});