<%
Dim RefreshTime, IdleTime, TotalUsers, OnlineUser(), Tmp(), Num, I, ID
RefreshTime = 10           '設置網頁自動更新時間為10秒
IdleTime = RefreshTime * 3 '設置閑置時間為自動更新時間的3倍
Application.Lock

'清點所有連線到此網頁的瀏覽器，然后將目前打開的瀏覽器的SessionID放入數組的后面
If Application(Session.SessionID & "LastAccessTime") = Empty Then
If Application("TotalUsers") = Empty Then Application("TotalUsers") = 0
ReDim Tmp(Application("TotalUsers") + 1)
Num = 0
If Application("TotalUsers") > 0 Then
    For I = LBOUND(Application("OnlineUser")) To UBOUND(Application("OnlineUser"))
      ID = Application("OnlineUser")(I)
      If ID <> Session.SessionID Then
        Tmp(Num) = ID
        Num = Num + 1
      End If
    Next
End If
Tmp(Num) = Session.SessionID
Application("TotalUsers") = Num + 1
ReDim Preserve Tmp(Application("TotalUsers"))
Application("OnlineUser") = Tmp
End If

'記錄目前打開的瀏覽器的近存取時間
Application(Session.SessionID & "LastAccessTime") = Timer

'檢查所有連線到此網頁的瀏覽器的近存取時間，若與目前時間相差30秒以上，表示離線
ReDim Tmp(Application("TotalUsers"))
Num = 0
For I = 0 To Application("TotalUsers") - 1
ID = Application("OnlineUser")(I)
If (Timer - Application(ID & "LastAccessTime")) < IdleTime Then
    Tmp(Num) = ID
    Num = Num + 1
Else
    Application(ID & "LastAccessTime") = Empty
End If
Next

'Num表示目前在線人數，若與Application("TotalUsers")不同，表示中間有人離線
If Num <> Application("TotalUsers") Then
ReDim Preserve Tmp(Num)
Application("OnlineUser") = Tmp
Application("TotalUsers") = Num
End If

Application.UnLock
%>

    ">


    目前在線人數：<%= Application("TotalUsers") %>