通过javascript检测是否安装了Silverlight

我是否可以使用javascript函数来检测当前浏览器中是否安装了特定的Silverlight版本？

Is there a javascript function I can use to detect whether a specific silverlight version is installed in the current browser?

我对Silverlight 2 Beta特别感兴趣2版。我不想使用默认方法在Silverlight控件后面显示一个图像，如果Silverlight插件没有加载，就会显示。

I'm particularly interested in the Silverlight 2 Beta 2 version. I don't want to use the default method of having an image behind the silverlight control which is just shown if the Silverlight plugin doesn't load.

编辑：从接受的答案中提供的链接：

From link provided in accepted answer:

包含Silverlight.js（来自Silverlight SDK）

Include Silverlight.js (from Silverlight SDK)

Silverlight.isInstalled("2.0");