docs: function isDblEvent(eventname, dbFun, dbArg, Fun, Arg) {
      var nowTarget = dbArg.target;
      if (this.currentEventName != null && this.currentEventName == eventname && this.currentTarget != null && this.currentTarget == nowTarget) {
          dbFun.call(this, dbArg);
          this.currentEventName = null;
          this.currentTarget = null;
          if (this.cleanCurrEventName) clearTimeout(this.cleanCurrEventName);
      } else {
          var oThis = this;
          if (this.cleanCurrEventName) clearTimeout(this.cleanCurrEventName);
          this.currentEventName = eventname;
          this.currentTarget = nowTarget;
          this.cleanCurrEventName = setTimeout(function () {
              oThis.currentEventName = null;
              this.currentTarget = null;
              Fun.call(oThis, Arg);
          }, 250);
      }
  }