Detect .Net Framework

[peterbf]

I have a homepage where I instanciate a .Net 2.0 component in an object
tag, but before instanciating the component, I would like to to check
first if the machine has the .Net 2.0 framework installed.

Anyone who knows how/if I can do this in javascript?

[Martin Honnen]

peterbf wrote:

I have a homepage where I instanciate a .Net 2.0 component in an object
tag, but before instanciating the component, I would like to to check
first if the machine has the .Net 2.0 framework installed.

IE/Win gets it user agent string changed if the .NET framework is
installed e.g. here with .NET 1.0 and 1.1 installed
navigator.userAgent
in IE gives you something alike
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.xyz;
..NET CLR 1.1.xyz)
so you could try to parse that userAgent string for .NET CLR and the
version numbers.
But I don't know how easy it is that someone reconfigures its IE not to
expose the installed .NET version in the user agent string, so no idea
whether it is reliable.
--

Martin Honnen
http://JavaScript.FAQTs.com/

[peterbf]

> But I don't know how easy it is that someone reconfigures its IE not to
expose the installed .NET version in the user agent string, so no idea
whether it is reliable.

Thats true, but its better than nothing -- thanks