asp解码url

解码函数
[code]
%
Function URLDecode(enStr)
dim deStr,strSpecial
dim c,i,v
deStr=""
strSpecial="!""#$%'()*+,.-_/:;=>?@[\]^`{|}~%"
for i=1 to len(enStr)
c=Mid(enStr,i,1)
if c="%" then
v=eval("h"+Mid(enStr,i+1,2))
if inStr(strSpecial,chr(v))>0 then
deStr=deStrchr(v)
i=i+2
else
v=eval("h"+ Mid(enStr,i+1,2) + Mid(enStr,i+4,2))
deStr=deStr chr(v)
i=i+5
end if
else
if c="+" then
deStr=deStr" "
else
deStr=deStrc
end if
end if
next
URLDecode=deStr
End function

response.Write URLDecode(request.QueryString("action"))
%>
[html]