Question : var state

In asp.net To keep  a variable state I am using a session variable but is there a better way as this seems a bit clumsy. below code does work fine.

  If Not Page.IsPostBack Then
            a = False
            Img1.ImageUrl = "images/triangle4.png"
            Session("abool") = a
              End If
..

   Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        a = Session("abool")
        If a = False Then
            Img1.ImageUrl = "images/triangle4b.png"
            a = True
        ElseIf a = True Then
            Img1.ImageUrl = "images/triangle4.png"
            a = False

        End If
        Session("abool") = a
    End Sub

Answer : var state

Not in DNS unless you actively change the DNS record.

You would need a hardware load-balancer of some kind I'm afraid.

Chris