js实现table合并相同列单元格

/**
 * Created with JetBrains WebStorm.
 * User: Johnny
 * Date: 18-3-26
 * Time: 下午4:48
 * Table td 相同值合并行 要求：
 *  1.table 必须包含tbody，tbody为数据主休
 *  2.table 添加  id="kbdatas"
 * 调用说明:
 *  $(function(){
 *       mergeRowSpan(4);
 *   });
 */
function uuidStr() {
    var s = [];
    var hexDigits = "0123456789abcdef";
    for (var i = 0; i < 36; i++) {
        s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
    }
    s[14] = "4";  // bits 12-15 of the time_hi_and_version field to 0010
    s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1);  // bits 6-7 of the clock_seq_hi_and_reserved to 01
    s[8] = s[13] = s[18] = s[23] = "-";
    var uuid = s.join("");
    return uuid;
}

function merge(icol){
    var tdTxt = "";
    var list_map = new Array();
    var uuid = uuidStr();
    $("#kbdatas").find("tbody tr").each(function(){
        var rmnode = $(this).attr("rmnode");
        if(rmnode==null||rmnode==undefined||rmnode==""){
            rmnode = 0;
        }
        var icolIndex = icol-rmnode;
        var txt = $(this).find("td:eq("+icolIndex+")").text().trim();
        if(tdTxt != txt){
            uuid = uuidStr();
            list_map.push(uuid);
            tdTxt = txt;
        }
        $(this).find("td:eq("+icolIndex+")").attr("tduuid",uuid);
    });
    for(var i = 0; i < list_map.length; i++){
        var tduuid = list_map[i];
        $("#kbdatas").find("td[tduuid='"+tduuid+"']").each(function(index,el){
            var tdlg = $("#kbdatas").find("td[tduuid='"+tduuid+"']").length;
            if(0==index){
                $(el).attr("rowspan",tdlg);
            } else {
                var rmnode = $(el).parent().attr("rmnode");
                if(rmnode==null||rmnode==undefined||rmnode==""){
                    rmnode = 1;
                } else {
                    rmnode++;
                }
                $(el).parent().attr("rmnode",rmnode);
                $(el).remove();
            }
        });
    }
}
function mergeRowSpan(colCount){
    for(var icol = 0; icol < colCount; icol++){        merge(icol);    }
}