<%@ Language=VBScript CODEPAGE=936%>
<% Option Explicit %>
<%
' ============================================
' 常用全局變量
' ============================================
' 數據庫對象
Dim oConn, oRs, sSql
' ********************************************
' 以下為數據庫相關函數
' ********************************************
' ============================================
' 初始化數據庫連接對象
' ============================================
Sub DBConnBegin()
	' 如果數據庫對象已打開，不要再打開
	If IsObject(oConn) = True Then Exit Sub
	' 如果你不創建一個數據庫連接對象，ADO會在每個記錄集打開時自動創建一個新的數據庫連接對象，就算你用的是相同的SQL語句。
	Set oConn = Server.CreateObject("ADODB.Connection")
	On Error Resume Next
	' SQL Server 2000數據庫
	Dim ConnStr
	ConnStr="Provider=SQLOLEDB.1;Server=IBM;UID=sa;PWD=zhujie;Database=BookSiteDB "
	oConn.Open ConnStr
	If  Err.Number > 0 Then
		' 完全地退出正在運行的腳本
		Response.End
	End If
	' 創建一個記錄集
	Set oRs = Server.CreateObject( "ADODB.Recordset" )
End Sub
' ============================================
' 釋放數據庫連接對象
' ============================================
Sub DBConnEnd()
	On Error Resume Next
	oRs.Close
	Set oRs = Nothing
	oConn.Close
	Set oConn = Nothing
End Sub


' ********************************************
' 以下為常用函數
' ********************************************
' ============================================
' 錯誤返回處理
' ============================================
Sub Go_Error(str)
	Call DBConnEnd()
	Response.Write "<script language=javascript>history.back();</script>"
	'Response.Write "<script language=javascript>alert('" & str & "\n\n請檢查...');<s/script>"
	Response.End
End Sub
Sub Go2_Error(str)
	Call DBConnEnd()
	Response.Write "<script language=javascript>alert('" & str & "\n\n系統將自動返回...');history.back();</script>"
	Response.End
End Sub

' ============================================
' 成功信息返回
' 參數:str 返回的錯誤信息
'      goUrl 返回的頁面
' ============================================
Sub Go_Success(str,goUrl)
	Response.Write "<script language=javascript>alert('" & str & "');location.href='"&goUrl&"';</script>"
	'Response.End
End Sub

' ============================================
' 格式化時間(顯示)
' 參數：n_Flag
'	1:"yyyy-mm-dd hh:mm:ss"
'	2:"yyyy-mm-dd"
'	3:"hh:mm:ss"
'	4:"yyyy年mm月dd日"
'	5:"yyyymmdd"
' ============================================
Function Format_Time(s_Time, n_Flag)
	Dim y, m, d, h, mi, s
	Format_Time = ""
	If IsDate(s_Time) = False Then Exit Function
	y = cstr(year(s_Time))
	m = cstr(month(s_Time))
	If len(m) = 1 Then m = "0" & m
	d = cstr(day(s_Time))
	If len(d) = 1 Then d = "0" & d
	h = cstr(hour(s_Time))
	If len(h) = 1 Then h = "0" & h
	mi = cstr(minute(s_Time))
	If len(mi) = 1 Then mi = "0" & mi
	s = cstr(second(s_Time))
	If len(s) = 1 Then s = "0" & s
	Select Case n_Flag
	Case 1
		' yyyy-mm-dd hh:mm:ss
		Format_Time = y & "-" & m & "-" & d & " " & h & ":" & mi & ":" & s
	Case 2
		' yyyy-mm-dd
		Format_Time = y & "-" & m & "-" & d
	Case 3
		' hh:mm:ss
		Format_Time = h & ":" & mi & ":" & s
	Case 4
		' yyyy年mm月dd日
		Format_Time = y & "年" & m & "月" & d & "日"
	Case 5
		' yyyymmdd
		Format_Time = y & m & d
	End Select
End Function

' ============================================
' 把字符串進行HTML解碼,替換server.htmlencode
' 去除Html格式，用于顯示輸出
' ============================================
Function outHTML(str)
	Dim sTemp
	sTemp = str
	outHTML = ""
	If IsNull(sTemp) = True Then
		Exit Function
	End If
	sTemp = Replace(sTemp, "&", "&amp;")
	sTemp = Replace(sTemp, "<", "&lt;")
	sTemp = Replace(sTemp, ">", "&gt;")
	sTemp = Replace(sTemp, Chr(34), "&quot;")
	sTemp = Replace(sTemp, Chr(10), "<br>")
	outHTML = sTemp
End Function

' ============================================
' 去除Html格式，用于從數據庫中取出值填入輸入框時
' 注意：value="?"這邊一定要用雙引號
' ============================================
Function inHTML(str)
	Dim sTemp
	sTemp = str
	inHTML = ""
	If IsNull(sTemp) = True Then
		Exit Function
	End If
	sTemp = Replace(sTemp, "&", "&amp;")
	sTemp = Replace(sTemp, "<", "&lt;")
	sTemp = Replace(sTemp, ">", "&gt;")
	sTemp = Replace(sTemp, Chr(34), "&quot;")
	inHTML = sTemp
End Function

' ============================================
' 檢測上頁是否從本站提交
' 返回:True,False
' ============================================
Function IsSelfRefer()
	Dim sHttp_Referer, sServer_Name
	sHttp_Referer = CStr(Request.ServerVariables("HTTP_REFERER"))
	sServer_Name = CStr(Request.ServerVariables("SERVER_NAME"))
	If Mid(sHttp_Referer, 8, Len(sServer_Name)) = sServer_Name Then
		IsSelfRefer = True
	Else
		IsSelfRefer = False
	End If
End Function

' ============================================
' 得到安全字符串,在查詢中使用
' ============================================
Function Get_SafeStr(str)
	Get_SafeStr = Replace(Replace(Replace(Trim(str), "'", ""), Chr(34), ""), ";", "")
End Function

' ============================================
' 取實際字符長度
' ============================================
Function Get_TrueLen(str)
	Dim l, t, c, i
	l = Len(str)
	t = l
	For i = 1 To l
		c = Asc(Mid(str, i, 1))
		If c < 0 Then c = c + 65536
		If c > 255 Then t = t + 1
	Next
	Get_TrueLen = t
End Function

' ============================================
' 用于插入數據庫的時候替換單引號"'"
' ============================================
Function InDb(str)
	Dim sTemp
	sTemp = trim(str)
	sTemp=replace(sTemp,"'","''")
	InDb=sTemp
End Function

' ============================================
' 判斷是否安全字符串,在注冊登錄等特殊字段中使用
' ============================================
Function IsSafeStr(str)
	Dim s_BadStr, n, i
	s_BadStr = "' 　&<>?%,;:()`~!@#$^*{}[]|+-=" & Chr(34) & Chr(9) & Chr(32)
	n = Len(s_BadStr)
	IsSafeStr = True
	For i = 1 To n
		If Instr(str, Mid(s_BadStr, i, 1)) > 0 Then
			IsSafeStr = False
			Exit Function
		End If
	Next
End Function
'# ----------------------------------------------------------------------------
'# 函數：LeftStr(text,length)
'# 描述：代替left函數按照中文兩個字符,字母一個字符的方式截長
'# 參數： text-字符串,length-要截取的長度
'# 返回：
'# 作者：Jay
'# 日期：2004
'#-----------------------------------------------------------------------------
Function LeftStr(text,length)  
	Dim t
	t=""
	Dim mt
	Dim l
	l=0
	Dim c
	For i= 1 To Len(text)
		mt=mid(text,i,1)
		c=Asc(mt)
		If c<0 Then c=c+65536
		If c > 255 Then
			l=l+2
		Else 
			l=l+1
		End If
		If l<=CLng(length) Then
			t=t&mt
		else
			exit for
		End If
	Next
	LeftStr=t
End Function

' ============================================
' 并經過處理返回數組形式(去除空行）
' 一般用于返回文本區的內容。
' ============================================
function GetSplit(text)
	dim textsplit
	text=replace(text,chr(13),"")
	textsplit=split(text,chr(10))
	text=""
	for i=0 to ubound(textsplit)
		if not isnull(textsplit(i)) and textsplit(i)<>"" then
			text=text&trim(textsplit(i))&"$$"
		end if
	next
	text=left(text,len(text)-2)
	textsplit=split(text,"$$")
	GetSplit=textsplit
end function

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