asp如何解析json字符串并转化为asp对象

Dim scriptCtrl
Function parseJSON(str)
    If Not IsObject(scriptCtrl) Then
        Set scriptCtrl = Server.CreateObject("MSScriptControl.ScriptControl")
        scriptCtrl.Language = "JScript"
        scriptCtrl.AddCode "Array.prototype.get = function(x) { return this[x]; }; var result = null;"
    End If
    scriptCtrl.ExecuteStatement "result = " & str & ";"
    Set parseJSON = scriptCtrl.CodeObject.result
End Function
Dim json
json = "{a:""aaa"", b:{ name:""bb"", value:""text"" }, c:[""item0"", ""item1"", ""item2""]}"
Set obj = parseJSON(json)
Response.Write obj.a & "<br />"
Response.Write obj.b.name & "<br />"
Response.Write obj.c.length & "<br />"
Response.Write obj.c.get(0) & "<br />"
Set obj = Nothing
Set scriptCtrl = Nothing