Sub Knockoutpie()
Dim Shp As Shape
Dim Cl As Range, Rng As Range
Set Shp = ActiveSheet.Shapes(Application.Caller)
Select Case Shp.Name
Case "NorthEast"
Set Rng = Range("E2:E20")
Case "SouthEast"
Set Rng = Range("F2:F20")
Case Else
Exit Sub
End Select
For Each Cl In Rng
If Evaluate("isref('" & Cl.Value & "'!A1)") Then
Worksheets(Cl.Value).Visible = Not .Worksheets(Cl.Value).Visible
End If
Next Cl
Worksheets("Views").Activate
End Sub