Display image of first article of shop

firstArticleOfShop.js

// MIT LICENSE, Tony Findeisen

(function(undefined) {

    var shopId = 205909,
        id = 'callback_' + shopId,
        locale = 'de_DE';

    var script = document.createElement('script');
    script.src = 'http://api.spreadshirt.de/api/v1/shops/' + shopId + '/articles?limit=1&locale=' + locale + '&mediaType=jsonp&callback=' + id;

    document.write('<div id="' + id + '"></div>');
    document.getElementsByTagName('head')[0].appendChild(script);

    window[id] = function(data) {
        window[id] = undefined;

        var img = new Image(),
            href = data.articles[0].resources[0].href;
        if (location.protocol != "file:") {
            href = href.replace(/https?:/, '');
        }

        img.src = href;

        document.getElementById(id).appendChild(img);
    };
})();