asp简单加密码算法

function 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