ASP格式化日期FormatDate

'================================================
'函数名：FormatDate
'作　用：格式化日期
'参　数：DateAndTime            (原日期和时间)
'       Format                 (新日期格式)
'返回值：格式化后的日期
'================================================
Function FormatDate(DateAndTime, Format)
  On Error Resume Next
  Dim yy,y, m, d, h, mi, s, strDateTime
  FormatDate = DateAndTime
  If Not IsNumeric(Format) Then Exit Function
  If Not IsDate(DateAndTime) Then Exit Function
  yy = CStr(Year(DateAndTime))
  y = Mid(CStr(Year(DateAndTime)),3)
  m = CStr(Month(DateAndTime))
  If Len(m) = 1 Then m = "0" & m
  d = CStr(Day(DateAndTime))
  If Len(d) = 1 Then d = "0" & d
  h = CStr(Hour(DateAndTime))
  If Len(h) = 1 Then h = "0" & h
  mi = CStr(Minute(DateAndTime))
  If Len(mi) = 1 Then mi = "0" & mi
  s = CStr(Second(DateAndTime))
  If Len(s) = 1 Then s = "0" & s
  
  Select Case Format
  Case "1"
    strDateTime = y & "-" & m & "-" & d & " " & h & ":" & mi & ":" & s
  Case "2"
    strDateTime = yy & m & d & h & mi & s
    '返回12位 直到秒 的时间字符串
  Case "3"
    strDateTime = yy & m & d & h & mi   
    '返回12位 直到分 的时间字符串
  Case "4"
    strDateTime = yy & "年" & m & "月" & d & "日"
  Case "5"
    strDateTime = m & "-" & d
  Case "6"
    strDateTime = m & "/" & d
  Case "7"
    strDateTime = m & "月" & d & "日"
  Case "8"
    strDateTime = y & "年" & m & "月"
  Case "9"
    strDateTime = y & "-" & m
  Case "10"
    strDateTime = y & "/" & m
  Case "11"
    strDateTime = y & "-" & m & "-" & d
  Case "12"
    strDateTime = y & "/" & m & "/" & d
  Case "13"
    strDateTime = yy & "." & m & "." & d
  Case "14"
    strDateTime = yy & "-" & m & "-" & d
  Case "15"
    strDateTime = m & "-" & d & " " & h & ":" & mi
    '返回12位 直到分 的时间字符串
  Case Else
    strDateTime = DateAndTime
  End Select
  FormatDate = strDateTime
End Function