Message box

[sara_22]

hi all,
i have a question
i want to display a message box in web page using asp.net
but the remaining problem , i want to run asp.net procedure when the user press ok button
and another procedure when the user press cancel button
where can i add this condition

Public Sub CreateMessageAlert(ByVal senderpage As System.Web.UI.Page, ByVal alertMsg As String, ByVal alertKey As String)
        Dim strScript As String
        strScript = "<script language=JavaScript>confirm('" + alertMsg + "')</script>"
        If Not (senderpage.IsStartupScriptRegistered(alertKey)) Then
            senderpage.RegisterStartupScript(alertKey, strScript)
        End If
    End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim alertmessage As String
        alertmessage = "Please select Folder before going to delete"
        Me.CreateMessageAlert(Me, alertmessage, "alertKey")
          End Sub