Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
If Target.Count > 1 Then Exit Sub
If Not Intersect(Target, Range("A1")) Is Nothing Then
weekNum = Trim(Str(Int(((Date - DateSerial(Year(Date), 1, 0)) + 6) / 7)))
Sheets(weekNum).Visible = True
Sheets(weekNum).Select
End If
End Sub