ASP digit and letter Verification Code (with random miscellaneous)

<% Option explicit Response. Buffer = true Response. expires =-1 Session. Timeout = 60 Call com_creatvalidcode ("validatecode ") Sub com_creatvalidcode (PSN) 'Prohibit caching 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' probability of occurrence of miscellaneous 'Color data (character, background) Dim vcolordata (1) Vcolordata (0) = chrb (204) & chrb (0) & chrb (0) 'Blue 204, green 0, red 0 (blue) Vcolordata (1) = chrb (252) & chrb (232) & chrb (221) 'Blue 252, green 232, red 221 (light blue) 'Randomly generated characters Const camount = 36' text count Const cCode = "0123456789 abcdefghijklmnopqrstuvwxyz" 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 'record the session 'Character data 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 (27th) = "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" 'Output image file headers 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) 'Output Image Information Headers 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 'goes through all rows For II = 0 to 3' goes through all words For IIi = 1 to 10' goes through all pixels 'Output image data row by row, word by word, and pixel by Pixel If RND * 99 + 1 <codds then' random generation of miscellaneous Response. binarywrite vcolordata (0) Else Response. binarywrite vcolordata (mid (vnumberdata (vcode (II), I * 10 + III, 1 )) End if Next Next Next End sub %>

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