For each ... in .... 语句的应用

For
...
Next
和
For each ... in ...
...
Next
语句的区别在于前者事先知道要循环多少次，而后者事先不知道要循环多少次。

For each ... in ...用法举例：
'取出request.querystring中全部参数及值
for each que in request.querystring
response.write que & "=" & request.querystring(que) & "<br>"
Next

'取出request.form中全部参数及值
for each que in request.form
response.write que & "=" & request.form(que) & "<br>"
Next

'取出本站全部cookies及值
for each coo in request.cookies
response.write coo & "=" & request.cookies(coo) & " "
next