在静态页面上用jquery ajax调用远程webservice接口，结果访问的时候都错误弹出1   提示 500 Internal Server Error
代码如下

         $(function () {
            $.ajax({
                type: "post",
                contentType: "application/json",
                url: "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/getSupportCityString",
                data: "{theRegionCode:'31127' }",
                dataType: "json",
                cache: false,
                success: function (result) {
                    //$("#strCount").html(result.d);
                    alert(2);
                },
                error: function (e) {
                    //$("#strCoun").html(e.toString());
                    alert(1);
                }
            });
        })
这个 如何解决？