code: function querystring(obj) {
          var parts = [];
  
          for (var i in obj) {
            if (obj.hasOwnProperty(i)) {
              parts.push(encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]));
            }
          }
  
          return parts.join('&');
        }
docs: @function querystring
  Object to Query String
  
  @param {object} obj
  @returns {string}