<%
Class StringList
    Private dict, strName, i

    Private Sub Class_Initialize()
        Set dict = CreateObject("Scripting.Dictionary")
        i = 0
    End Sub
    
    Public Property Get Count()
        Count = i
    End Property
    
    Public Property Let Name(newValue)
        strName = newValue
    End Property
    
    Public Property Get Name()
        Name = strName
    End Property
    
    Public Sub Add(strValue)
        i = i + 1
        dict.Add i, strValue
    End Sub
    
    Public Default Property Get ToString()
        ToString = Me.Item(Empty)
    End Property
    
    Public Property Get Item(index)
        If Not IsEmpty(index) And IsNumeric(index) Then
            If index<1 Then Err.Raise -1, "StringList.Item", "下标越界"
            If index>i Then Err.Raise -1, "StringList.Item", "下标越界"
            Item = dict.Item(index)
        ElseIf i>0 Then
            Item = Join(dict.Items(), ", ")
        End If
    End Property
End Class

Function decodeURIComponent(str, cSet)
    With Server.CreateObject("ADODB.Stream")
        .Type = 2
        .Charset = "iso-8859-1"
        .Open
        .WriteText UnEscape(Replace(str, "+", "%20"))
        .Position = 0
        .Charset = cSet
        decodeURIComponent = .ReadText(-1)
        .Close
    End With
End Function

Function getParameter(name, cSet, dictionary)
    Dim match : Set getParameter = New StringList : getParameter.Name = name
    With New RegExp
        .Pattern = "(?:^|&)" & Server.URLEncode(name) & "=([^&]*)"
        .Global = True
        For Each match In .Execute(dictionary)
            getParameter.Add decodeURIComponent(match.Submatches.Item(0), cSet)
        Next
    End with
End Function


%>
<%=getParameter("p", "UTF-8", Request.QueryString)%><br />
<%=getParameter("p", "UTF-8", Request.QueryString).Count%><br />
<%=getParameter("p", "UTF-8", Request.QueryString).Item(1)%><br />


<!--


Dim p
Set p = getParameter("p", "UTF-8", Request.QueryString)
p.Count
p.Item(1)

p.Count 和 p.Item(index)  是在当出现同名参数时 使用.

如果不考虑同名参数,则代码可以进行大幅删减

-->