code: function() {
          var E = YAHOO.util.Event;
          E.removeListener(this.submitEl, "click", this.submit);
          E.removeListener(this.cancelEl, "click", this.cancel);
          E.removeListener(this.yearEl, "blur");
          E.removeListener(this.monthEl, "change");
          if (this.__isIEQuirks) {
              E.removeListener(this.cal.oDomContainer, "resize", this._syncMask);
          }
  
          this.purgeKeyListeners();
      }
docs: Removes/purges DOM event listeners from the rendered elements
  
  @method purgeListeners