Browser Plugin Detection

Question

Anyone know how to determine if a particular plugin is installed on a user's browser? The plugin in question is AlternaTIFF.

Answer 1

I believe navigator.plugins gives you access to that information, it has name, description, and supported mimetypes of each plugin.

Answer 2

AlternaTIFF has some code that does that, it looks like: http://www.alternatiff.com/testpage.html

Answer 3

For IE just try to create it.

var installed = true;
try {
  newObj = new ActiveXObject(YOUROBJECT.whatever);
} catch {
  installed = false;
}