code: function() {
          if (this.__rendered) {
              this.purgeListeners();
  
              // Clear out innerHTML references
              this.yearEl = null;
              this.monthEl = null;
              this.errorEl = null;
              this.submitEl = null;
              this.cancelEl = null;
              this.firstCtrl = null;
              this.lastCtrl = null;
              if (this.navEl) {
                  this.navEl.innerHTML = "";
              }
  
              var p = this.navEl.parentNode;
              if (p) {
                  p.removeChild(this.navEl);
              }
              this.navEl = null;
  
              var pm = this.maskEl.parentNode;
              if (pm) {
                  pm.removeChild(this.maskEl);
              }
              this.maskEl = null;
              this.__rendered = false;
          }
      }
docs: Removes all renderered HTML elements for the Navigator from
  the DOM, purges event listeners and clears (nulls) any property
  references to HTML references
  @method erase