海東科技先來帶大家看一看HTML5的進制編碼的基礎知識內容吧，相信對于大家學習HTML5會有很大的幫助。
16進制編碼轉換
Private Function WordToHex(byVal lValue)
Dim lByte
Dim lCount
For lCount = 0 To 3
lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And MD5_m_lOnBits(BITS_TO_A_BYTE - 1)
WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
Next
End Function
'MD5主函數 MD5(字符串,編碼位)
Public Function MD5(byVal sMessage, byVal sType)
Dim x
Dim k
Dim AA
Dim BB
Dim CC
Dim DD
Dim a
Dim b
Dim c
Dim d
Const S11 = 7
Const S12 = 12
Const S13 = 17
Const S14 = 22
Const S21 = 5
Const S22 = 9
Const S23 = 14
Const S24 = 20
Const S31 = 4
Const S32 = 11
Const S33 = 16
Const S34 = 23
Const S41 = 6
Const S42 = 10
Const S43 = 15
Const S44 = 21
x = ConvertToWordArray(sMessage) '加密步驟1：數組轉換
a = &H67452301
b = &HEFCDAB89
c = &H98BADCFE
d = &H10325476
For k = 0 To UBound(x) Step 16
AA = a
BB = b
CC = c
DD = d
'加密步驟2：編碼轉換
MD5_FF a, b, c, d, x(k + 0), S11, &HD76AA478
MD5_FF d, a, b, c, x(k + 1), S12, &HE8C7B756
MD5_FF c, d, a, b, x(k + 2), S13, &H242070DB
MD5_FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE
MD5_FF a, b, c, d, x(k + 4), S11, &HF57C0FAF
MD5_FF d, a, b, c, x(k + 5), S12, &H4787C62A
MD5_FF c, d, a, b, x(k + 6), S13, &HA8304613
MD5_FF b, c, d, a, x(k + 7), S14, &HFD469501
MD5_FF a, b, c, d, x(k + 8), S11, &H698098D8
MD5_FF d, a, b, c, x(k + 9), S12, &H8B44F7AF
MD5_FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1
