code: function(elTh, oColumn) {
      SDT.superclass._initThEl.call(this, elTh, oColumn);
      elTh.id = this.getId() +"-fixedth-" + oColumn.getSanitizedKey(); // Needed for getColumn by TH and ColumnDD
  }
docs: SDT changes ID so as not to duplicate the accessibility TH IDs.
  
  @method _initThEl
  @param elTh {HTMLElement} TH element reference.
  @param oColumn {YAHOO.widget.Column} Column object.
  @private