合并行的js方法，三个参数，分别是要合并行的table，row是要从第几行开始合并，列是合并第几列，要注意，如果要合并多列，

需要从右向左合并

        function autoRowSpan(tb, row, col) {
            var lastValue = "";
            var value = "";
            var pos = 1;
            for (var i = row; i < tb.rows.length - 1; i++) {
                value = tb.rows[i].cells[col].innerText;
                if (lastValue == value && value != "" ) {
                    tb.rows[i].deleteCell(col);
                    tb.rows[i - pos].cells[col].rowSpan = tb.rows[i - pos].cells[col].rowSpan + 1;
                    pos++;
                } else {
                    lastValue = value;
                    pos = 1;
                }
            }
        }

调用代码：

            autoRowSpan(dataTable, 2, 1); //从第二行合并第二列
            autoRowSpan(dataTable, 2, 0); //从第二行合并第一列