麻烦大家来给看一眼,哈哈

 //修改地区
           $("input[par='update']").click(function(){
           $("#btn_Update").show();//这是显示
           $("#btn_Yin").show();//这是显示
           $("#btn_Del").show();//这是显示
           $("#btn_Add").hide();//这是隐藏
           $("#tb2").show();//这是显示  
           var regionId=$(this).attr("id");
            //生成随机数，改变请求,防止浏览器缓存
            var timeParam = Math.round(new Date().getTime() / 1000);
            $.getJSON("Handler/Handler.ashx",{method:'GetModel',regionId:regionId,s:timeParam},function(json){
                if(json.Model!=null)
                {
                    $.each(json.Model,function(i,n){
                    //地域代码id
                        $("#rId").val(n.regionId);                    //地区名字
                        $("#name").val(n.regionName);
                    //地区所属 
                        var parentid = n.parentId;
              
                        var level = n.level;
                        var idpath = n.idpath;
                      
                        var s = idpath.indexOf('|');
                        
                        if(parentid!="0")
                        {
                           var id = idpath.toString().split('|')[0];
                           var id1 = idpath.toString().split('|')[1];
                             if(level=="2")
                             {
                                if(id1==n.regionId)
                                {  
                                    provinceAndCity("selectR","selectP","selectC",id ,"0","0");
                                }
                                else
                                {
                                    provinceAndCity("selectR","selectP","selectC",id,id1,"0");
                                    
                                }
                             }
                             else
                             {
                                var id2=idpath.toString().split('|')[3];
                             
                                if(id2==n.regionId)
                                {  
                                    provinceAndCity("selectR","selectP","selectC",id,id1 ,"0");
                                }
                                else
                                {
                                    provinceAndCity("selectR","selectP","selectC",id,id1,id2);
                                }
                             }
                        }
                        else
                        {
                            provinceAndCity("selectR","selectP","selectC","0","0","0");
                        }
                         $("#Simplified").val(n.Simplified);
                         $("#alias").val(n.alias);
                    //地区区号
                        $("#CodeFor").val(n.codeFor);
                    //地区邮编 
                        $("#ZipCode").val(n.zipCode);  
                    })
                }
                else
                {
                alert("操作失败");
                }
           })
         })传值方面的，一点击修改 将表单里的值传到另一个表中的文本框和下拉框中，文本框中的已经都可以传入 但是一共有三个下拉框(省市区), 第一个省份已传值 但是城市和区域实在是找不到错误所在了 ，麻烦大家给看一眼。谢谢