| <% Option Explicit Response.Buffer = True Response.Expires = -1 Session.TimeOut=60 Call Com_CreatValidCode("Validatecode") Sub Com_CreatValidCode(pSN) ’ 禁止缓存 Response.Expires = -9999 Response.AddHeader "Pragma","no-cache" Response.AddHeader "Cache-Control","no-cache" Response.ContentType = "Image/BMP" Randomize Dim i, ii, iii Const cOdds = 0 ’ 杂点出现的机率 ’ 颜色的数据(字符，背景) Dim vColorData(1) vColorData(0) = ChrB(204) & ChrB(0) & ChrB(0) ’ 蓝204，绿0，红0（蓝色） vColorData(1) = ChrB(252) & ChrB(232) & ChrB(221) ’ 蓝252，绿232，红221（浅蓝色） ’ 随机产生字符 Const cAmount = 36 ’ 文字数量 Const cCode = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" Dim vCode(4), vCodes For i = 0 To 3 vCode(i) = Int(Rnd * cAmount) vCodes = vCodes & Mid(cCode, vCode(i) + 1, 1) Next Session(pSN) = vCodes ’记录入Session ’ 字符的数据 Dim vNumberData(35) vNumberData(0) = "1110000111110111101111011110111101001011110100101111010010111101001011110111101111011110111110000111" vNumberData(1) = "1111011111110001111111110111111111011111111101111111110111111111011111111101111111110111111100000111" vNumberData(2) = "1110000111110111101111011110111111111011111111011111111011111111011111111011111111011110111100000011" vNumberData(3) = "1110000111110111101111011110111111110111111100111111111101111111111011110111101111011110111110000111" vNumberData(4) = "1111101111111110111111110011111110101111110110111111011011111100000011111110111111111011111111000011" vNumberData(5) = "1100000011110111111111011111111101000111110011101111111110111111111011110111101111011110111110000111" vNumberData(6) = "1111000111111011101111011111111101111111110100011111001110111101111011110111101111011110111110000111" vNumberData(7) = "1100000011110111011111011101111111101111111110111111110111111111011111111101111111110111111111011111" vNumberData(8) = "1110000111110111101111011110111101111011111000011111101101111101111011110111101111011110111110000111" vNumberData(9) = "1110001111110111011111011110111101111011110111001111100010111111111011111111101111011101111110001111" vNumberData(10) = "1111011111111101111111101011111110101111111010111111101011111100000111110111011111011101111000100011" vNumberData(11) = "1000000111110111101111011110111101110111110000111111011101111101111011110111101111011110111000000111" vNumberData(12) = "1110000011110111101110111110111011111111101111111110111111111011111111101111101111011101111110001111" vNumberData(13) = "1000001111110111011111011110111101111011110111101111011110111101111011110111101111011101111000001111" vNumberData(14) = "1000000111110111101111011011111101101111110000111111011011111101101111110111111111011110111000000111" vNumberData(15) = "1000000111110111101111011011111101101111110000111111011011111101101111110111111111011111111000111111" vNumberData(16) = "1110000111110111011110111101111011111111101111111110111111111011100011101111011111011101111110001111" vNumberData(17) = "1000100011110111011111011101111101110111110000011111011101111101110111110111011111011101111000100011" vNumberData(18) = "1100000111111101111111110111111111011111111101111111110111111111011111111101111111110111111100000111" vNumberData(19) = "1110000011111110111111111011111111101111111110111111111011111111101111111110111110111011111000011111" vNumberData(20) = "1000100011110111011111011011111101011111110001111111010111111101101111110110111111011101111000100011" vNumberData(21) = "1000111111110111111111011111111101111111110111111111011111111101111111110111111111011110111000000011" vNumberData(22) = "1000100011110010011111001001111100100111110101011111010101111101010111110101011111010101111001010011" vNumberData(23) = "1000100011110011011111001101111101010111110101011111010101111101100111110110011111011001111000110111" vNumberData(24) = "1110001111110111011110111110111011111011101111101110111110111011111011101111101111011101111110001111" vNumberData(25) = "1000000111110111101111011110111101111011110000011111011111111101111111110111111111011111111000111111" vNumberData(26) = "1110001111110111011110111110111011111011101111101110111110111011111011101001101111011001111110001011" vNumberData(27) = "1000001111110111011111011101111101110111110000111111010111111101101111110110111111011101111000110011" vNumberData(28) = "1110000011110111101111011110111101111111111001111111111001111111111011110111101111011110111100000111" vNumberData(29) = "1000000011101101101111110111111111011111111101111111110111111111011111111101111111110111111110001111" vNumberData(30) = "1000100011110111011111011101111101110111110111011111011101111101110111110111011111011101111110001111" vNumberData(31) = "1000100011110111011111011101111101110111111010111111101011111110101111111010111111110111111111011111" vNumberData(32) = "1001010011110101011111010101111101010111110101011111001001111110101111111010111111101011111110101111" vNumberData(33) = "1000100011110111011111101011111110101111111101111111110111111110101111111010111111011101111000100011" vNumberData(34) = "1000100011110111011111011101111110101111111010111111110111111111011111111101111111110111111110001111" vNumberData(35) = "1100000011110111011111111101111111101111111110111111110111111111011111111011111111101110111100000011" ’ 输出图像文件头 Response.BinaryWrite ChrB(66) & ChrB(77) & ChrB(230) & ChrB(4) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) &_ ChrB(0) & ChrB(0) & ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) &_ ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(10) & ChrB(0) &_ ChrB(0) & ChrB(0) & ChrB(1) & ChrB(0) ’ 输出图像信息头 Response.BinaryWrite ChrB(24) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(176) & ChrB(4) &_ ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) &_ ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) &_ ChrB(0) & ChrB(0) For i = 9 To 0 Step -1 ’ 历经所有行 For ii = 0 To 3 ’ 历经所有字 For iii = 1 To 10 ’ 历经所有像素 ’ 逐行、逐字、逐像素地输出图像数据 If Rnd * 99 + 1 < cOdds Then ’ 随机生成杂点 Response.BinaryWrite vColorData(0) Else Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1)) End If Next Next Next End Sub %> |
| 来源：www.sql163.com |
