docs: function(url){
                  var self = this;
  
                  ajaGo._xhr.call(this, url, function processRes(res){
                      if(res){
                          try {
                              res = JSON.parse(res);
                          } catch(e){
                              self.trigger('error', e);
                              return null;
                          }
                      }
                      return res;
                  });
              }