table动态合并单元格 jquery直接贴代码吧

直接贴代码吧
$.fn.extend({
        //表格合并单元格，colIdx要合并的列序号，从0开始
        "rowspan": function (colIdx) {
            return this.each(function () {
                var that;
                $('tr', this).each(function (row) {
                    $('td:eq(' + colIdx + ')', this).filter(':visible').each(function (col) {
                        if (that != null && $(this).html() == $(that).html()) {
                            rowspan = $(that).attr("rowSpan");
                            if (rowspan == undefined) {
                                $(that).attr("rowSpan", 1);
                                rowspan = $(that).attr("rowSpan");
                            }
                            rowspan = Number(rowspan) + 1;
                            $(that).attr("rowSpan", rowspan);
                            $(this).hide();
                        } else {
                            that = this;
                        }
                    });
                });
            });
        }
    });
    
    
    <body>
        <table style="width: 800px;height: 300px;border: 1px dashed #ccc;">
            <tr>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
                <th>Header</th>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>

            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>3</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>

            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>3</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>6</td>
                <td>Data</td>

            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>3</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>

            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>3</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>3</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>3</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>8</td>
                <td>Data</td>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>8</td>
                <td>Data</td>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>4</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>8</td>
                <td>Data</td>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>4</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>8</td>
                <td>Data</td>
            </tr>
            <tr>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
                <td>Data</td>
            </tr>
        </table>
    </body>
    
    调用
                $("table").rowspan(2); //第三列合并
    需要先引入jquery
    动态的可以加个延迟调用
    setTimeout(function(){$("table").rowspan(2)},50);