省市县三级联动

三级联动的代码*（心情很差呀，白忙了一上午，说要搞离线的，记录下来呗，已被不时之需）

function hdfsUpload(){
                     cmApi.request.httpGetAsync('/xzqh/getXzqh',JSON.stringify({"province":"province"}),'mainModule.xzqh');
    }
    function xzqh(ret){


           var  province = [];

            var len = ret.length;

            for (var i = 0;i < len;i++){
                             var objPro = {};

                             objPro["p_id"] =  ret[i].ggfwXzqhCjdm;
                             objPro["name"] = ret[i].ggfwXzqhCjmc;
                             province.push(objPro);
            }
            var select = $("#pro");

               select.empty();

            var lenPro = province.length;
           for (var j = 0;j < lenPro;j++){
                   var options = '<option value="'+province[j].p_id+'" >'
                                + province[j].name
                                +'</option>';
                    select.append(options);
            }
  cmApi.request.httpGetAsync('/xzqh/getXzqhsj',JSON.stringify({"proId":province[0].p_id}),'mainModule.xzqhsj');
            $("#pro").change(function(){
                cmApi.request.httpGetAsync('/xzqh/getXzqhsj',JSON.stringify({"proId":$(this).val()}),'mainModule.xzqhsj');

            })

    }
    function xzqhsj(ret){
                    var  sjArr = [];
                    var len = ret.length;
                    for (var i = 0;i < len;i++){
                                        var objPro = {};

                                     objPro["sj_id"] =  ret[i].ggfwXzqhCjdm;
                                     objPro["name"] = ret[i].ggfwXzqhCjmc;
                                     sjArr.push(objPro);
                    }
                    var select = $("#sj");
                    select.empty();
                    var lenPro = sjArr.length;
                   for (var j = 0;j < lenPro;j++){
                           var options = '<option value="'+sjArr[j].sj_id+'" >'
                                        + sjArr[j].name
                                        +'</option>';
                            select.append(options);
                    }
   cmApi.request.httpGetAsync('/xzqh/getXzqhxj',JSON.stringify({"sjId":sjArr[0].sj_id}),'mainModule.xzqhxj');
                     $("#sj").change(function(){
                                 // alert($(this).val());
                                   cmApi.request.httpGetAsync('/xzqh/getXzqhxj',JSON.stringify({"sjId":$(this).val()}),'mainModule.xzqhxj');

                                })

    }
    function xzqhxj(ret){
                                   var  xjArr = [];
                                    var len = ret.length;
                                    for (var i = 0;i < len;i++){
                                                     var objPro = {};
                                                     objPro["xj_id"] =  ret[i].ggfwXzqhCjdm;
                                                     objPro["name"] = ret[i].ggfwXzqhCjmc;
                                                     xjArr.push(objPro);
                                    }
                                    var select = $("#xj");
                                       select.empty();
                                    var lenPro = xjArr.length;
                                   for (var j = 0;j < lenPro;j++){
                                           var options = '<option value="'+xjArr[j].xj_id+'" >'
                                                        + xjArr[j].name
                                                        +'</option>';
                                            select.append(options);
                                    }

    }