根据传来的省市县乡值实现自动填充的四级联动

if (provinceId != '' && provinceId != null && provinceId != 'null') {
    $('#provinceId').val(provinceId);
    signupRecordObj.getCity(provinceId,cityId,countyId,townId);
}

"getCity":function (provinceId,cityId,countryId,townId) {/*根据省获取城市信息*/
    var cityObj = {url: configJS.hostUrl() + '/province/citys', async: false, param:{"provinceId":provinceId},method:"GET"};
    commonJS.sendAjaxRequest(cityObj, function (value) {/*初始化省信息*/
        $("#cityId").html("<option value='' >市</option>");
        if (value != null && value.body != null) {
            $($("#city_template").render(value.body)).appendTo("#cityId");
            if (cityId != null && cityId != null && cityId != 'null') {
                $("#cityId").val(cityId);
                signupRecordObj.getCounty(cityId,countryId,townId);
            }
        }
    });
},

"getCounty":function (cityId,countyId,townId) {/*根据城市获取区县信息*/
    var countyObj = {url: configJS.hostUrl() + '/province/countys', async: false, param:{"cityId":cityId},method:"GET"};
    commonJS.sendAjaxRequest(countyObj, function (value) {/*初始化市信息*/
        $("#countyId").html("<option value='' >区/县</option>");
        if (value != null && value.body != null) {
            $($("#county_template").render(value.body)).appendTo("#countyId");
            if (countyId != null && countyId != null && countyId != 'null') {
                $("#countyId").val(countyId);
                signupRecordObj.getTown(countyId,townId);
            }
        }
    });
},

"getTown":function (countyId,townId) {/*根据区县获取乡镇信息*/
    var townObj = {url: configJS.hostUrl() + '/province/towns', async: false, param:{"countyId":countyId},method:"GET"};
    commonJS.sendAjaxRequest(townObj, function (value) {/*初始化区县信息*/
        $("#townId").html("<option value='' >乡/镇</option>");
        if (value != null && value.body != null) {
            $($("#town_template").render(value.body)).appendTo("#townId");
            if (townId != null && townId != '' && townId != 'null') {
                $("#townId").val(townId);
            }
        }
    });
},