client-side javascript popup--help

hi all,
i am trying to implement this tutorial/code in my web application to show client-side javascript popups alerting the user of various task (ie. updating, inserting and deleting records). 
the link: http://archive.devnewz.com/devnewz-3-20061129JavaScriptAlertShowmessagefromASPNETCodebehind.html
 
i have come up with the following ASP.NET VB code using ASP 3.5:
Imports System.Web
Imports System.Text
Imports System.Web.UI
''' <summary>
''' A JavaScript alert
''' </summary>
Public Class Alert

    ''' <summary>
    ''' Shows a client-side JavaScript alert in the browser.
    ''' </summary>
    ''' <param name="message">The message to appear in the alert.</param>
    Public Shared ...