text: var setParam = function(uri, key, value) {
      var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");
      var separator = uri.indexOf('?') !== -1 ? "&" : "?";
  
      if (uri.match(re)) {
          return uri.replace(re, '$1' + key + "=" + value + '$2');
      }
      else {
          return uri + separator + key + "=" + value;
      }
  }