VBS倒计时器

一个实现VBS倒计时的代码 
以下内容为程序代码:
<script language="VBScript">
       Dim oTime : oTime = 5
       Function STime
            document.all("oInput").value = "00:00:" & oTime
            If oTime>0 Then
               oTime = oTime - 1
               window.setTimeout "STime", 1000
            Else
               MsgBox "时间到了！"
            End If
       End Function
       Sub Window