asp.net Ajax

$(function() {
            $("#Button1").click(function() {  //无参数
                $.ajax({
                    type: "post", //访问WebService使用Post方式请求
                    contentType: "application/json", //WebService 会返回Json类型
                    url: "WebService.asmx/HelloWorld",  //调用WebService的地址和方法名称组合
                    data: "{}",     //这里是要传递的参数，格式为 data: "{paraName:paraValue}",
                    dataType: "json",
                    success: function(result) { //回调函数，result，返回值
                        $("#Label1").html(result.d);
                    }
                });
            });
            $("#Button2").click(function() {
                $.ajax({
                    type: "post",
                    contentType: "application/json",
                    url: "WebService.asmx/GetWish",
                    data: "{value1:'万事如意',value2:'心想事成',value3:'牛牛牛',value4:'2011'}",
                    dataType: "json",
                    success: function(result) {
                        $("#Label2").html(result.d);
                    }
                });
            });
            $("#Button3").click(function() {
                $.ajax({
                    type: "post",
                    contentType: "application/json",
                    url: "../MapBar/MapBarWebService.asmx/GetJD",
                    data: "{}",
                    dataType: "json",
                    success: function(result) {
                        $(result.d).each(function() {
                            $("#Label3").html(this.toString() + "," + $("#Label3").html());
                        });
                    }
                });
            });
            $("#Button4").click(function() {   //ajax调用后台方法必须为静态方法
                $.ajax({
                    type: "post",
                    contentType: "application/json",
                    url: "JqueryWebService.aspx/GetStr",
                    data: "{str:'jquery调用后台方法'}",
                    dataType: "json",
                    success: function(result) {
                        $("#Label4").html(result.d);
                    }
                });
            });
        });