Asp如何防止网页频繁刷新？

<%
dim RefreshIntervalTime
RefreshIntervalTime = 3 '防止刷新的时间秒数，0表示不防止
If Not IsEmpty(Session("visit")) and isnumeric(Session("visit")) and int(RefreshIntervalTime) > 0 Then
if (timer()-int(Session("visit")))*1000 < RefreshIntervalTime * 1000 then
  Response.write ("<meta http-equiv=""refresh"" content="""