相关图片如下：
screen.width-500)this.style.width=screen.width-500;\" border=0>
Dim objCanvas
Dim PointX,PointY,PointColor
Dim iTemp
Dim SafeCode
Dim R,G,B,cc,kk

Const cAmount = 36 \' 文字数量
Const cCode = \"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ\"
cc=80
kk=30
SafeCode = \"\"
Session(\"SafeCode\") = \"\"

BGColor = \"FFFFFF\"

R = Mid(BGColor,1,2)
G = Mid(BGColor,3,2)
B = Mid(BGColor,5,2)



R = DecHex(R)
G = DecHex(G)
B = DecHex(B)

Set objCanvas = New Canvas

objCanvas.GlobalColourTable(0) = RGB(255,255,255) \' White
objCanvas.GlobalColourTable(1) = RGB(0,0,0) \' Black
objCanvas.GlobalColourTable(2) = RGB(255,0,0) \' Red
objCanvas.GlobalColourTable(3) = RGB(0,255,0) \' Green
objCanvas.GlobalColourTable(4) = RGB(0,0,255) \' Blue
objCanvas.GlobalColourTable(5) = RGB(128,0,0)
objCanvas.GlobalColourTable(6) = RGB(0,128,0)
objCanvas.GlobalColourTable(7) = RGB(0,0,128)
objCanvas.GlobalColourTable(8) = RGB(128,128,0)
objCanvas.GlobalColourTable(9) = RGB(0,128,128)
objCanvas.GlobalColourTable(10) = RGB(128,0,128)
objCanvas.GlobalColourTable(11) = RGB(R,G,B)

objCanvas.BackgroundColourIndex = 11

objCanvas.Resize cc,kk,false


\'Randomize timer
\'SafeCode = cint(8999*Rnd+1000)

Randomize
For i = 0 To 3
SafeCode = SafeCode &\" \"& Mid(cCode, Int(Rnd * cAmount) + 1, 1)
Next
\'杂点

For iTemp = 0 To 30
Randomize timer
PointX = Int(Rnd * cc)
PointY = Int(Rnd * kk)
PointColor = Int(Rnd * 3)+2
objCanvas.ForegroundColourIndex = PointColor
objCanvas.Line PointX,PointY,PointX,PointY

next
\'边框
objCanvas.ForegroundColourIndex = 1
objCanvas.Line 1,1,cc,1
objCanvas.Line 1,kk,1,1
objCanvas.Line 1,kk,cc,kk
objCanvas.Line cc,1,cc,kk

Session(\"SafeCode\") = SafeCode
dim sc,sk
\'文字
Randomize timer
sc = cint(3*Rnd)
sk = cint(3*Rnd)
objCanvas.DrawTextWE sc,sk,SafeCode
objCanvas.Write

Function DecHex (HStr)

Dim Result
Dim i,L

Result = 0


L = Len(Hstr)

For i = L-1 To 0 Step -1

Result = Result + (16 ^ i)*GetDecBit(Mid(HStr,i+1,1))

Next

DecHex = Result

End Function

Function GetDecBit (HStr)

Dim Result
Dim R(16)
Dim i

Result = 0

R(0) = \"0\"
R(1) = \"1\"
R(2) = \"2\"
R(3) = \"3\"
R(4) = \"4\"
R(5) = \"5\"
R(6) = \"6\"
R(7) = \"7\"
R(8) = \"8\"
R(9) = \"9\"
R(10) = \"A\"
R(11) = \"B\"
R(12) = \"C\"
R(13) = \"D\"
R(14) = \"E\"
R(15) = \"F\"

For i = 0 To 15

if HStr=R(i) Then Result = i : Exit For

Next

GetDecBit = Result

End Function