pop up page

Hai. Need the help. I have situation where I need to open the pupup page (popup.aspx) and close the page. Comes back to Normal page (Normal.aspx) But problem is. I could open the Popup page. But when it comes back to normal page. Page Happened in the format of PopUp page. Eg. Assumed two page called Normal (normal.Aspx) and Popup (PopUp.Aspx) normal.aspx and code look like this Protected Sub btn_open_popup_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btn_open_popup.Click       Dim queryString As String = "PopUp.aspx”             Dim newWin As String = "window.open('" & queryString & "');"             ClientScript.RegisterStartupScript(Me.GetType(), "pop", newWin, True) End Sub Find it work well In PopUp Page Protected Sub btn_open_normalPage _Click(By ...