Page loses formatting after executing script

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Hi. I am an ASP newbie working on someone else's page, and I need a little guidance...
The page (call it Page A) contains formatting (CSS style sheet). I have added a button to the form that displays a Word document in a new window.

Code:
   Protected Sub btnSpecSheet_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSpecSheet.Click
        Dim specstyle As String
        If Me.txtStyle.Text > "" Then
            Try
                specstyle = Me.txtStyle.Text
                Response.Write("<script>")
&nbs ...