//行合并插件
jQuery.fn.rowspan = function(colIdx) { //封装的一个JQuery小插件
    return this.each(function(){
        var that;
        $('tr', this).each(function(row) {
            $('td:eq('+colIdx+')', this).each(function(col) {
                if (that!=null && this.innerText == that.outerText) {
                    rowspan = $(that).attr("rowSpan");
                    if (rowspan == undefined) {
                        $(that).attr("rowSpan",1);
                        rowspan = $(that).attr("rowSpan");
                    }
                    rowspan = Number(rowspan)+1;
                    $(that).attr("rowSpan",rowspan);
                    $(that).css("line-height", 50 * rowspan + 'px');
                    $(this).hide();
                } else {
                    that = this;
                }
            });
        });
    });
}

$("#dwgsTable").rowspan(0);

dwgsTable：table的ID

<table class="table table-bordered table-condensed" id="dwgsTable">
    <thead>
    <tr>
        <th style="width: 45px">序号</th>
        <th>项目名称</th>
        <th>单位工程名称</th>
        <th>专业</th>
        <th>送审金额</th>
        <th>协审人员</th>
        <th>协审复核人员</th>
    </tr>
</thead>
</table>
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本文链接：https://www.cnblogs.com/Marlo/p/16138997.html