code: function(cell) {
      var elCell = this.getTdEl(cell);
  
      if(elCell) {
          // Make sure previous cell is unhighlighted
          if(this._elLastHighlightedTd) {
              this.unhighlightCell(this._elLastHighlightedTd);
          }
  
          var oRecord = this.getRecord(elCell);
          var sColumnKey = this.getColumn(elCell.cellIndex).getKey();
          Dom.addClass(elCell,DT.CLASS_HIGHLIGHTED);
          this._elLastHighlightedTd = elCell;
          this.fireEvent("cellHighlightEvent", {record:oRecord, column:this.getColumn(elCell.cellIndex), key:this.getColumn(elCell.cellIndex).getKey(), el:elCell});
          return;
      }
  }
docs: Assigns the class YAHOO.widget.DataTable.CLASS_HIGHLIGHTED to the given cell.
  
  @method highlightCell
  @param cell {HTMLElement | String} DOM element reference or ID string.