Const ForReading = 1
Const ForWriting = 2

Set fso = Wscript.CreateObject("Scripting.FileSystemObject")
Set folder = fso.GetFolder("d:inetpubwwwroot")
Set files = folder.files

varText = "Script that you want to delete"

For Each f1 In files
    If InStr(f1,".asp") > 0 Or InStr(f1,".htm") > 0 Or InStr(f1,".html") > 0
Then
    Set f = fso.OpenTextFile(f1,ForReading)
    If Not f.AtEndOfStream Then
        varNew = Replace(f.ReadAll,varText,"")
        Set f = fso.OpenTextFile(f1,ForWriting )
        f.Write varNew
    End If
    Set f = Nothing
    End If
Next

MsgBox "Change OK"