code: function (cell) {
              var cellInfo = this.getCellInfo(cell),
                  rightColIndex = cellInfo.colIndex + cellInfo.colSpan,
                  rightCellInfo = this.indexTable[cellInfo.rowIndex][rightColIndex],
                  rightCell = this.getCell(rightCellInfo.rowIndex, rightCellInfo.cellIndex);
              //合并
              cell.colSpan = cellInfo.colSpan + rightCellInfo.colSpan;
              //被合并的单元格不应存在宽度属性
              cell.removeAttribute("width");
              //移动内容
              this.moveContent(cell, rightCell);
              //删掉被合并的Cell
              this.deleteCell(rightCell, rightCellInfo.rowIndex);
              this.update();
          }
docs: 向右合并单元格