vb 2008 parsing to find javascript?

See more:

VB

hi,

below is code for reading through the source code of a website but how do i say if there is any javascript in there then show 'form2'?

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim pandora As System.Net.HttpWebRequest = System.Net.HttpWebRequest.Create(TextBox1.Text)
        Dim response As System.Net.HttpWebResponse = pandora.GetResponse
        Dim braco22 As System.IO.StreamReader = New System.IO.StreamReader(response.GetResponseStream)
        Dim source As String = braco22.ReadToEnd

        TextBox2.Text = source
EndSub

p.s. i am using visual basic 2008 express

thanks in advance to any helpers