Wscript.echo or msgbox() will pop up windows on your screen. If you want to open a web window,try something like what I do to popup a log-file in notepad here, by calling the application you want to open- hope it helps:
'************************************************
' CallExecutable Sub
' This sub initializes a command line shell to
' kick off a given script
'************************************************
Sub CallExecutable(strScript,intWindow)
Dim objShell
Set objShell = WScript.CreateObject("WScript.Shell"

objShell.Run strScript,intWindow,TRUE
End Sub
Dim strTempName
strTempName = "C:\temp\test.log
Call CallExecutable("notepad.exe " & strTempName,1)