code: function(src) {
              src = Util.getRealUrl(src || location.href);
              delete Util.stack[src];
              if (Util.support.storage) {
                  var key = Util.getLocalKey(src);
                  localStorage.removeItem(key.data);
                  localStorage.removeItem(key.time);
                  localStorage.removeItem(key.title);
              }
          }
docs: 清除cache