.item.active ~ .item.active:before {
    content: ', ';
}

function loadXML() {
    return $.ajax({ url: 'data.xml', dataType: 'xml' });
}

function loadMap() {
    dfd = $.Deferred();
    var script = document.createElement("script");
    script.type = "text/javascript";
    script.src = "http://maps.google.com/maps/api/js?sensor=false&callback=finishMapLoading";
    document.body.appendChild(script);
    return dfd.promise();
}

function finishMapLoading() {
    dfd.resolve();
}

function loadData() {
    var LMap = loadMap();
    var LXML = loadCoupons();
    $.when( LMap, LXML ).then( function() {
        doSomethingAwesome();
    });
}

window.onload = function() {
    loadData();
}