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½«ÒÔÏ´úÂë·Åµ½Ò»¸öµ¥¶ÀµÄÒ³Ãæcheckcode.asp
<%
Option Explicit
Response.buffer=true
Call Com_CreatValidCode("validateCode")
Sub Com_CreatValidCode(pSN)
' ½ûÖ¹»º´æ
Response.Expires = -9999
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
Response.ContentType = "Image/BMP"
Randomize
Dim i, ii, iii
Const cOdds = 2 ' ÔÓµã³öÏֵĻúÂÊ
Const cAmount = 10 ' ÎÄ×ÖÊýÁ¿
Const cCode = "0123456789"
' ÑÕÉ«µÄÊý¾Ý(×Ö·û£¬±³¾°)
Dim vColorData(1)
vColorData(0) = ChrB(0) & ChrB(0) & ChrB(211)  ' À¶0£¬ÂÌ0£¬ºì0£¨ºÚÉ«£©
vColorData(1) = ChrB(255) & ChrB(255) & ChrB(255) ' À¶250£¬ÂÌ236£¬ºì211£¨Ç³À¶É«£©
' Ëæ»ú²úÉú×Ö·û
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  '¼Ç¼ÈëSession
' ×Ö·ûµÄÊý¾Ý
Dim vNumberData(9)
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) = "