servervariables >
query-string

ServerVariables("Query_String")

网址后面的参数(不含问号)

QueryString= Request.ServerVariables("Query_String")

if the URL has a "?" question mark included
the the Len(QueryString)>0

Tips: security to prevent some one to hake 
your submit form Ezer suggest add a check point 
to check the length of :;

Len(QueryString)

取出"?"之后的字符串

所以同理也可测其自串的长度

http://3w.ezer.com/search/index.asp?dir1=&page=2&q=server

<%

Query_String="http://3w.ezer.com/search/index.asp?
dir1=&page=2&q=server"

QueryString= Request.ServerVariables("Query_String")

response.write QueryString

%>

-----------------Tip------------

you may often see URL request like this:

http://www.----.com/?aKeyword

here (aKeyword) is a quary

<%

quaryX= Request.ServerVariables("Query_String")

%>

then you can easy to use the request

技巧:防护你个人的(Submit form)窗体
简单方式以避免黑客玩弄你重要的query
减少非法呼叫与外侵袭击

道理虽是简单, 但仍有很多企业网站轻忽

技巧:可建立直接读取"?"之后的关键词成为
query呼叫送出

dir1=&page=2&q=server

---------- attention :: -----------

the ? (question mark) shall not be included

tips: you can see the Len(QueryString)>0

you may avoid hacker to play around your quary
by writing this ::
<%

if Len(QueryString)>0 then
response.write "stop hacking me"
response.end
end if

%>

However you shall know about how to use
(get) and (post) submit form before use it.

注意不含问号