param = function (obj) {
            var query = '';
            var name, value, fullSubName, subName, subValue, innerObj, i;

            for (name in obj) {
                value = obj[name];

                if (value instanceof Array) {
                    for (i = 0; i < value.length; ++i) {
                        subValue = value[i];
                        fullSubName = name + '[' + i + ']';
                        innerObj = {};
                        innerObj[fullSubName] = subValue;
                        query += param(innerObj) + '&';
                    }
                } else if (value instanceof Object) {
                    for (subName in value) {
                        subValue = value[subName];
                        fullSubName = name + '[' + subName + ']';
                        innerObj = {};
                        innerObj[fullSubName] = subValue;
                        query += param(innerObj) + '&';
                    }
                } else if (value !== undefined && value !== null) {
                    query += encodeURIComponent(name) + '='
                        + encodeURIComponent(value) + '&';
                }
            }

            return query.length ? query.substr(0, query.length - 1) : query;
        }
The workhorse; converts an object to x-www-form-urlencoded serialization.
@param {Object} obj
@return {String}