javascript 表格并排放 js表格合并

1.合并
 function autoRowSpan(tbid, row, col) {
            var tb = document.getElementById(tbid);
            var lastValue = "";
            var value = "";
            var pos = 1;
            for (var i = row; i < tb.rows.length; i++) {
                value = tb.rows[i].cells[col].innerText;
                if (lastValue == 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;
                }
            }
        }
2.根据上一例合并记录合并下一列function autoRowSpan2(tbid, row, col) {
var tb = document.getElementById(tbid);
var lastValue = "";
var value = "";
var pos = 1;
for (var i = row; i < tb.rows.length; i++) {
var rospan = tb.rows[i].cells[0].getAttribute('rowSpan');
if (rospan > 1) {
lastValue = tb.rows[i].cells[col].innerText;var index = 1;
for (var j = i + 1; j < tb.rows.length; j++) {
if (index == rospan) break;value = tb.rows[j].cells[col - 1].innerText;
//alert(value);
if (lastValue == value) {
tb.rows[j].deleteCell(col - 1);
index++;
} else {
lastValue = value;
}
}
tb.rows[i].cells[col].rowSpan = index;
//tb.rows[i].cells[col].rowSpan = index;
}
}
} 
 function merge() {
                var totalRow = $("#table_ZC tbody").find("tr").length;
                var totalCol = $("#table_ZC tbody").find("tr").eq(0).find("td").length;
                for (var col = totalCol - 7; col >= 0; col--) {
                    spanNum = 1;
                    startCell = $("#table_ZC tbody").find("tr").eq(totalRow - 1).find("td").eq(col);

                    for (var row = totalRow - 1; row >= 1; row--) {
                        targetCell = $("#table_ZC tbody").find("tr").eq(row - 1).find("td").eq(col);
                        if (startCell.text() == targetCell.text() && startCell.text() != "") {

                            spanNum++;
                            targetCell.attr("rowSpan", spanNum);
                            startCell.remove();
                        } else {
                            spanNum = 1;
                        }
                        startCell = targetCell;
                    }
                }
            }3.合并table 的第一个单元格
 function merge() {
              var totalRow = $(".jjtable tbody").find("tr").length;                spanNum = 1;
                startCell = $(".jjtable tbody").find("tr").eq(totalRow - 1).find("td").eq(0);                for (var row = totalRow - 1; row >= 1; row--) {
                    targetCell = $(".jjtable tbody").find("tr").eq(row - 1).find("td").eq(0);
                    if (startCell.text() == targetCell.text() && startCell.text() != "") {                        spanNum++;
                        targetCell.attr("rowSpan", spanNum);
                        startCell.remove();
                    } else {
                        spanNum = 1;
                    }
                    startCell = targetCell;
                }
        }