Edit in JSFiddle

function getChartById(id){
    return $('#'+id).highcharts();
}

$(function(){
    createChart('container1','Title of Chart #1');
    createChart('container2','Title of Chart #2');    
    $('#selection').change(function(){
        alert(getChartById($(this).val()).options.title.text);
    });
});

function createChart(containerId, title) {
    var chartingOptions = {
        title: {
            text: title
        },
        subtitle: {
            text: '<a href="http://ahumbleopinion.com/category/highcharts/">Highcharts @ A Humble Opinion</a>',
            useHTML: true
        },
        credits: {
            text: "Jugal Thakkar",
            href: "http://jugal.me/"
        },
        xAxis: {
            categories: ['Jan', 'Feb', 'Mar', 'Apr']
        },
        series: [{
            name: 'Mumbai',
            data: [24.2, 24.6, 26.7, 28.6]
        }]
    };
    $('#' + containerId).highcharts(chartingOptions);
}