code: function(cell) {
      var elCell = this.getTdEl(cell);
      if(elCell) {
          var nThisTdIndex = elCell.cellIndex;
          var elRow = this.getTrEl(elCell);
          if(nThisTdIndex < elRow.cells.length-1) {
              return elRow.cells[nThisTdIndex+1];
          }
          else {
              var elNextRow = this.getNextTrEl(elRow);
              if(elNextRow) {
                  return elNextRow.cells[0];
              }
          }
      }
      return null;
  }
docs: Returns DOM reference to the next TD element from the given cell, or null.
  
  @method getNextTdEl
  @param cell {HTMLElement | String | Object} DOM element reference or string ID, or
  object literal of syntax {record:oRecord, column:oColumn} from which to get next TD element.
  @return {HTMLElement} Reference to next TD element, or null.