众所周知：asp(VBS)是不区分大小写的，但是你要理解这句话的意思，请看下面实例

Test.asp

<%
Dim aName
If Request.QueryString("name") <> "" Then
        aName = Trim(Request.QueryString("name"))
        Select Case aName
                Case "new"
                        Response.Write "New"
                        Response.End
                Case "top"
                        Response.Write "Top"

                        Response.End
                Case Else
                        Response.Write "Other"
                        Response.End
        End Select
Else
        Response.Write "No Value"
        Response.End
End If
%>

如果你执行http://localhost/test.asp?name=new，它会输出：New
而如果执行http://localhost/test.asp?name=New，它却输出：Other

所以确保不出现意想不到的错误，在select  Case中先将条件转成大/小写，这样

<%
Dim aName
If Request.QueryString("name") <> "" Then
        aName = LCase(Request.QueryString("name"))
        Select Case aName
                Case "new"
                        Response.Write "New"
                        Response.End
                Case "top"
                        Response.Write "Top"

                        Response.End
                Case Else
                        Response.Write "Other"
                        Response.End
        End Select
Else
        Response.Write "No Value"
        Response.End
End If
%>

总之，要理解VB不区分大小写的意思是什么...

对象名、属性名、变量名等本身构成的语法不区分大小写
然而属性值、变量值区分大小写，也就是说："A"="a"为false