删除表格除第一行以外的其他行以及将表格内容拼接字符串

function serializeTab(){
                 var str="";
                $("#itemTab tr").each(function(i){
                    if(i!=0){
                         var len=$(this).find("td").size();
                         $(this).find("td").each(function(j){
                            if(j<len-1){
                                if(j!=len-2){
                                    str=str+$(this).text()+"|";
                                }else{
                                    str=str+$(this).text();
                                }
                            }
                         });
                         if(i!=$("#itemTab tr").size()-1){
                            str=str+"||";
                        }
                    }
                });
                return str;
            }

 

$("#itemList").hide();
                    var tr1=$("#itemTab").find("tr:first");
                    $("#itemTab").empty();
                    $("#itemTab").append(tr1);