Detect if java is installed and enabled using javascript

Question

I need to determine if a user has Java installed and enabled through JavaScript. The first requirement is easy to fulfill; I use the script deployment toolkit:

http://download.oracle.com/javase/6/docs/technotes/guides/jweb/deployment_advice.html

However, in a situation where the user installed java, but they disabled it (support was not disabled in the browser, but disabled using the java control panel in Windows), the installed versions are still displayed during calls deployJava.getJREs(). Is there a way to detect Java versions that are installed and enabled using JavaScript?

Answer 1

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