Modified and fixed Affililink

gistfile1.js

var addTagToEnd, universalCode;
universalCode = {
    'amazon.co.uk': 'tag=',
        'amazon.com': 'tag=',
        'amazon.de': 'tag=',
        'amazon.fr': 'tag=pragmaticentrepreneurs-21',
        'javari.co.uk': 'tag=',
        'javari.de': 'tag=',
        'javari.fr': 'tag=pragmaticentrepreneurs-21',
        'amazonsupply.com': 'tag=',
        'amazonwireless.com': 'tag=',
        'endless.com': 'tag='
};
addTagToEnd = function (url) {
    var link, match, match2, tag, domain;
    domain = url.split("/")[2];
    for (link in universalCode) {
        tag = universalCode[link];
        if (!(domain === link || domain.substring(domain.length - link.length - 1) === '.' + link)) {
            continue;
        }
        if (!(link && tag)) {
            return url; //no change
        }
        match = tag.match(/([a-zA-Z0-9\-]+)=([a-zA-Z0-9\-]+)/);
        if (!match[2]) { //if tag is not configured
            return url; //no change
        }
        match2 = new RegExp(match[1] + '=([a-zA-Z0-9\-]+)');
        if (url.search(match2) > -1) {
            url = url.replace(match2, match[1] + '=' + match[2]);
            return url;
        }
        if (url.substring(url.length, url.length - 1) === '/') {
            url += '?' + match[1] + '=' + match[2];
            return url;
        }
        if (url.match(/(\?)/)) {
            url += '&' + match[1] + '=' + match[2];
        } else {
            url += '/?' + match[1] + '=' + match[2];
        }
        return url;
    }
};