<% 
Call Com_CreatValidCode(Request.QueryString("tel")) 
Public Sub Com_CreatValidCode(pTel) 
'----------禁止緩存 
Response.Expires = 0 
Response.AddHeader "Pragma","no-cache" 
Response.AddHeader "cache-ctrol","no-cache" 
Response.ContentType = "Image/BMP" 
Randomize 
Dim i, ii, iii ,rndColor,strLen,sql,rs 
Const cOdds = 5 '------------雜點出現(xiàn)的機率 
Const str="0123456789-" 
strLen = len(pTel) 
rndColor = ChrB(cint(rnd*255)) & ChrB(cint(rnd*255)) & ChrB(cint(rnd*255)) 
'-----------顏色的數(shù)據(jù)(字符，背景) 
Dim vColorData(1) 
'vColorData(0) = ChrB(0) & ChrB(0) & ChrB(0) '----藍0，綠0，紅0（黑色） 
'vColorData(1) = ChrB(255) & ChrB(255) & ChrB(255) '----藍250，綠236，紅211（淺藍色） 
'vColorData(0) = ChrB(197) & ChrB(106) & ChrB(49) '---- 藍0，綠0，紅0（黑色） 
'vColorData(1) = ChrB(238) & ChrB(210) & ChrB(193) '-----藍250，綠236，紅211（淺藍色） 
vColorData(0) = ChrB(0) & ChrB(0) & ChrB(0) '---------藍0，綠0，紅0（黑色） 
vColorData(1) = ChrB(205) & ChrB(237) & ChrB(245) '------------藍250，綠236，紅211（淺藍色） 
'--------------------隨機產生字符 
Randomize 
Dim vCode() 
redim vCode(strLen-1) 
For i = 0 To strLen-1 
vCode(i) =instr(1,str,mid(pTel,i+1,1),1)-1 
Next 
'-----------字符的數(shù)據(jù) 
Dim vNumberData(11) 
'Verdana Font 
vNumberData(0) = "11111111111000111101110111011101110111011101110111011101110111011110001111111111" 
vNumberData(1) = "11111111111101111110011111110111111101111111011111110111111101111110001111111111" 
vNumberData(2) = "11111111111000111101110111011101111110111111011111101111110111111100000111111111" 
vNumberData(3) = "11111111111000111101110111111101111100111111110111111101110111011110001111111111" 
vNumberData(4) = "11111111111110111111001111101011111010111101101111100001111110111111100111111111" 
vNumberData(5) = "11111111110000011101111111011111110000111111110111111101110111011110001111111111" 
vNumberData(6) = "11111111111000111101101111011111110000111101110111011101110111011110001111111111" 
vNumberData(7) = "11111111110000011101101111111011111101111111011111110111111101111111011111111111" 
vNumberData(8) = "11111111111000111101110111011101111000111101110111011101110111011110001111111111" 
vNumberData(9) = "11111111111000111101110111011101110111011110000111111101111011011110000111111111" 
vNumberData(10) = "11111111111111111111111111111111111111111100000111111111111111111111111111111111" 
vNumberData(11) = "11111111111111111111111111111111111111111111111111111111111111111111111111111111" 
'-----------------輸出圖像文件頭 <br> 
Response.BinaryWrite ChrB(66) & ChrB(77) &chrb(((strLen*8*10*3+54) mod 256)) & chrb(((strLen*8*10*3+54)/ 256)mod 256) & ChrB((((strLen*8*10*3+54)/ 256)/256)mod 256) & ChrB(((((strLen*8*10*3+54)/ 256)/256)/256)mod 256) & 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(strLen*8) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(10) & ChrB(0) &_ 
ChrB(0) & ChrB(0) & ChrB(1) & ChrB(0) 
'------------------輸出圖像信息頭 
Response.BinaryWrite ChrB(24) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0)&_ 
ChrB((strLen*8*10*3)mod 256)&ChrB(((strLen*8*10*3)/256)mod 256)&ChrB((((strLen*8*10*3)/256)/256)mod 256)&ChrB(((((strLen*8*10*3)/256)/256)/256)mod 256)&_ 
ChrB(196) & ChrB(14) & ChrB(0) & ChrB(0) & ChrB(196) & ChrB(14)&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 '----------歷經所有行 
For ii = 0 To strLen-1 '-------歷經所有字 
For iii = 1 To 8 '--------歷經所有像素 
'---------逐行、逐字、逐像素地輸出圖像數(shù)據(jù) 
If Rnd * 99 + 1 < cOdds Then '---------隨機生成雜點 
Response.BinaryWrite rndColor 
Else 
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 8 + iii, 1)) 
End If 
Next 
Next 
Next 
End Sub 
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