jquery 動態表格合併

$.fn.extend({
    //表格合併單元格，colIdx要合併的列序號，從0開始
    "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;
                    }
                });
            });
        });
    }
  });

  $("#testlist").rowspan(1); //第一列合併