code: function(type, args, el) {
              Panel.superclass._autoFillOnHeightChange.apply(this, arguments);
              if (bIEQuirks) {
                  var panel = this;
                  setTimeout(function() {
                      panel.sizeUnderlay();
                  },0);
              }
          }
docs: The default custom event handler executed when the Panel's height is changed,
  if the autofillheight property has been set.
  
  @method _autoFillOnHeightChange
  @protected
  @param {String} type The event type
  @param {Array} args The array of arguments passed to event subscribers
  @param {HTMLElement} el The header, body or footer element which is to be resized to fill
  out the containers height