$('document').ready(function () {
    $('#contentHolder').on('click', '.historyAPI', function (e) {
        e.preventDefault();
        var href = $(this).attr('href');
        getContent(href, true);
    });
});


window.addEventListener("popstate", function (e) {
    getContent(location.pathname, false);
});


function getContent(url, addEntry) {
    $(function () {
        $("#contentHolder").load(url);
    });

    if (addEntry == true) {
        history.pushState(null, null, url);
    }

}