code: function() {
          var c = this.cal.oDomContainer;
          if (c && this.maskEl) {
              var r = YAHOO.util.Dom.getRegion(c);
              YAHOO.util.Dom.setStyle(this.maskEl, "width", r.right - r.left + "px");
              YAHOO.util.Dom.setStyle(this.maskEl, "height", r.bottom - r.top + "px");
          }
      }
docs: Used to set the width/height of the mask in pixels to match the Calendar Container.
  Currently only used for IE6 or IE in quirks mode. The other A-Grade browser are handled using CSS (width/height 100%).
  <p>
  The method is also registered as an HTMLElement resize listener on the Calendars container element.
  </p>
  @protected
  @method _syncMask