ASP中ByVal与ByRef的区别

废话不多说，贴代码：
先来看看ByVal传值：
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<%
Dim arr(2)
arr(0) = 0
arr(1) = 1
arr(2) = 2
Call sub1(arr)
Sub sub1(ByVal a)
a(0) = 9
a(1) = 8
a(2) = 7
Response.Write("我在sub过程中更改了值："&a(0)&","&a(1)&","&a(2))
End Sub
Response.Write("在sub过程外输出值："&arr(0)&","&arr(1)&","&arr(2))
%> 
下面是输出结果：
我在sub过程中更改了值：9,8,7在sub过程外输出值：0,1,2 
再来看看ByRef传值：
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<%
Dim arr(2)
arr(0) = 0
arr(1) = 1
arr(2) = 2
Call sub1(arr)
Sub sub1(ByRef a)
a(0) = 9
a(1) = 8
a(2) = 7
Response.Write("我在sub过程中更改了值："&a(0)&","&a(1)&","&a(2))
End Sub
Response.Write("在sub过程外输出值："&arr(0)&","&arr(1)&","&arr(2))
%> 
下面是输出结果：
我在sub过程中更改了值：9,8,7在sub过程外输出值：9,8,7 
下面我们来看看asp默认是以什么方式传值的
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<%
Dim arr(2)
arr(0) = 0
arr(1) = 1
arr(2) = 2
Call sub1(arr)
Sub sub1(ByRef a)
a(0) = 9
a(1) = 8
a(2) = 7
Response.Write("我在sub过程中更改了值："&a(0)&","&a(1)&","&a(2))
End Sub
Response.Write("在sub过程外输出值："&arr(0)&","&arr(1)&","&arr(2))
%> 
输出结果：
我在sub过程中更改了值：9,8,7在sub过程外输出值：9,8,7 
这说明在vbscript中默认的传值方式是ByRef