ASP可逆算法

unction encrypt(ecode)
　　Dim texts
　　dim i
　　for i=1 to len(ecode)
　　texts=texts & chr(asc(mid(ecode,i,1))+i)
　　next
　　      encrypt = texts
　　end function
　　function decrypt(dcode)
　　  dim texts
　　dim i
　　for i=1 to len(dcode)
　　texts=texts & chr(asc(mid(dcode,i,1))-i)
　　next
　　decrypt=texts
　　end function
　　function mistake(preString)
  　　    Dim texts
  　    　Dim seed
      　　Dim i,length
      　　prestring = trim(preString)
      length = len(preString)
      seed = length
      Randomize(length)
      texts = ""
      for i = 1 to length
            seed = int(94*rnd(-asc(mid(preString,i,1))-seed*asc(right(prestring,1)))+32)
            texts = texts & chr(seed) & chr(int(94*rnd(-seed)+32))
      next
　　dim dist
　　dist=""
　　for i = 1 to len(texts)
 　　 if mid(texts,i,1)<>"'"  then
      dist=dist+mid(texts,i,1)
      end if
 　　   next
 　　   mistake = dist
　　end function