webservice in asp.net

Dear Sir / Madam,

I have small doubt regarding web service in asp.net....

i have created a web service in my asp web application..

here i added a sample web service code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

/// <summary>
/// Summary description for Sample
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class Sample: System.Web.Services.WebService {

    public Sample() {

        //Uncomment the following line if using designed components
        //InitializeComponent();
    }

    [WebMethod]
    public string HelloWorld() {
        return "Hello sijon.......";
    }
        [WebMethod]
    public string HelloWorld1() {
        return "Hello sijon.......";
    }
}

here i added 2 web method....

my aim is to call web method1 when i browse sample.asmx service...

i need to access the webmethod1 whenever i call webservice......

when i browse the below link

http://localhost:10808/Web/sample.asmx

it list out the available webmethods, then i need to click invoke then only the webmethod will work...  i need to work my webmethod1 by defualt when the webservice loads same like page load event in asp page....

how can i call webservice method in service loading.. or tell me the same event(page loading event in asp pages) in web service..

thanks in advance...