查了下手册，原来IE6就有滴，可是只能获取当前文档内滴插件，而不是浏览器滴！
plugins CollectionRetrieves a collection of all embed objects within the document.ResThe plugins collection is exposed for compatibility with other browsers.
The collection is an alias for the embeds collection on the document. Applies ToclientInformation, navigator
plugins CollectionRetrieves a collection of all embed objects within the document.ResThe plugins collection is exposed for compatibility with other browsers.
The collection is an alias for the embeds collection on the document. Applies ToclientInformation, navigator
http://download.csdn.net/source/308913样式表中文手册
http://download.csdn.net/source/304124JScript语言参考
http://download.csdn.net/source/308916