Calling webmethod from Jquery

Calling the web method from Client side event and Jquery;

You need to first create the webmethod,
Creating the webmethod to add the employee;

[System.Web.Services.WebMethod]

    public static string AddEmployeeDetails(int num, string  Name)

    {

        EmplyeeBAO ObjEmplyeee = new EmplyeeBAO();

        ObjEmplyeee.AddItem(num, Name);

        return "Add";

    }

Call below jqery code to insert the employee data by calling the web method which has written on code behind window;

jQuery.ajax({

            url: 'Default.aspx/AddEmployeeDetails',

            type: "POST",

            data: "{'num' : " + num + ",'Name':" + Name + "}",

            contentType: "application/json; charset=utf-8",

            dataType: "json",

            beforeSend: function () {

                alert("Start!!! ");

            },

            success: function (data) {

                alert("a");

            },

            failure: function (msg) { alert("Sorry Not inserted!!! "); }

        });