怎样判断用户是否非正常离开聊天室？

如何判断用户是否非正常离开聊天室？

    total = application("AllPeople")<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

' 聊天总人数.
    aryHuman = split(total,";")
    for i = lbound(aryHuman) to ubound(aryHuman) - 1
    if application("user" & i) = "online" then
    if int(timer) - int(application("TimeBegin" & i)) > 120 then
    application("user" & i) = ""
    temp = aryHuman(i)
    aryName = split(temp,",")
    hrefname =  aryName(0)
    for j = lbound(aryHuman) to ubound(aryHuman) - 1
    if application("user" & j) = "online" then
  application("content" & j) = "<FONT color=#000000>〖精彩春风之聊天室的系统公告〗"&hrefname&"</FONT>" &"<font  color=#F08000 >"& "掉线了..." & "</font><font color = #000000 class=p9>" & "  <" & time() & "></font><br>" & application
("content" & j)
    end if
    next
    end if
    end if
    next

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