如何编制一个产生随机密码的函数？

<%
response.write makepassword(16)

function makepassword(byval maxlen)

dim strnewpass
dim whatsnext, upper, lower, intcounter
randomize

for intcounter = 1 to maxlen
    whatsnext = int((1 - 0 + 1) * rnd + 0)
if whatsnext = 0 then
        upper = 90
        lower = 65
else
        upper = 57
        lower = 48
end if
        strnewpass = strnewpass & chr(int((upper - lower + 1) * rnd + lower))
next
        makepassword = strnewpass
      ' 指定字符范围.

end function
%>

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