<sript language="vbsript" runat="server">
  sub appliation_onstart
    application("app_js")=0
  end sub
  sub session_onstart
    application.lock
    application("app_js")=appliation("app_js")+1
    application.unlock;
  end sub
  sub session_onend
    application.lock
    application("app_js")=appliation("app_js")-1
    application.unlock;
  end sub
</script>