Function: Use the ASP program to generate the phone number in the page into an image format.
Here is a quote:
<%
Call Com_CreatValidCode(Request.QueryString("tel"))
Public Sub Com_CreatValidCode(pTel)
'----------Disable caching
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 '--------The probability of noise appearing
Const str="0123456789-"
strLen = len(pTel)
rndColor = ChrB(cint(rnd*255)) & ChrB(cint(rnd*255)) & ChrB(cint(rnd*255))
'----------Color data (characters, background)
Dim vColorData(1)
'vColorData(0) = ChrB(0) & ChrB(0) & ChrB(0) '----Blue 0, Green 0, Red 0 (black)
'vColorData(1) = ChrB(255) & ChrB(255) & ChrB(255) '----Blue 250, Green 236, Red 211 (light blue)
'vColorData(0) = ChrB(197) & ChrB(106) & ChrB(49) '---- Blue 0, Green 0, Red 0 (black)
'vColorData(1) = ChrB(238) & ChrB(210) & ChrB(193) '-----Blue 250, Green 236, Red 211 (light blue)
vColorData(0) = ChrB(0) & ChrB(0) & ChrB(0) '---------Blue 0, Green 0, Red 0 (black)
vColorData(1) = ChrB(205) & ChrB(237) & ChrB(245) '------------Blue 250, Green 236, Red 211 (light blue)
'---- ---------------- Randomly generate characters
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
'----------Character data
Dim vNumberData(11)
'Verdana Font
vNumberData(0) = "11111111111000111101110111011101110111011101110111011101110111011110001111111111"
vNumberData(1) = "11111111111101111110011111110111111101111111011111110111111101111110001111111111"
vNumberData(2) = "11111111111000111101110111011101111110111111011111101111110111111100000111111111"
vNumberData(3) = "11111111111000111101110111111101111100111111110111111101110111011110001111111111"
vNumberData(4) = "111111111111101111110011111010111110101111011011111000011111101111111001111111111"
vNumberData(5) = "11111111110000011101111111011111110000111111110111111101110111011110001111111111"
vNumberData(6) = "11111111111000111101101111011111110000111101110111011101110111011110001111111111"
vNumberData(7) = "111111111100000111011011111110111111011111110111111101111111011111110111111111111"
vNumberData(8) = "11111111111000111101110111011101111000111101110111011101110111011110001111111111"
vNumberData(9) = "11111111111000111101110111011101110111011110000111111101111011011110000111111111"
vNumberData(10) = "11111111111111111111111111111111111111111100000111111111111111111111111111111111"
vNumberData(11) = "11111111111111111111111111111111111111111111111111111111111111111111111111111111"
'-----------------Output image file header<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)
'------------------Output image information header
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 '----------Go through all rows
For ii = 0 To strLen-1 '------Go through all words
For iii = 1 To 8 '--------Go through all pixels
'---------Output image data line by line, word by word, and pixel by pixel
If Rnd * 99 + 1 < cOdds Then '--------- Randomly generate noise
Response.BinaryWrite rndColor
Else
Response.BinaryWrite vColorData(Mid(vNumberData(vCode(ii)), i * 8 + iii, 1))
End If
Next
Next
Next
End Sub
%>
Save the above code as img.asp and insert <img src="img.asp?tel=010-0000000"> where you want to display the phone number.