牧羊岛

摘要： 看例子var xml:XML =<s/>;trace(xml.ddd);//空串trace(typeof(xml.ddd));//xmltrace(xml.ddd.toString());//空串trace(xml.ddd.toXMLString());//空串trace(xml.ddd.length());//0足以证明，xml是个特殊的objectvar xml:Object = {};trace(xml.ddd);//undefinedtrace(typeof(xml.ddd));//undefinedtrace(xml.ddd.toString());//报错trace(x 阅读全文