This is not an html plugin, it is a VB/VBA function that can not have preview here, to see it working, you need to add it to your VBA project and run the function

If you don't know what I am talking about, then this maybe not for you

' Finds a file in the open workbooks
' Can be used as User-Defined-Function
Function FindFile(FileName) As Boolean
Dim Fo As Boolean
FindFile = False
For i = Workbooks.Count To 1 Step -1
If UCase(Workbooks(i).Name) = UCase(FileName) Then
FindFile = True
Exit Function
End If
Next i
End Function