I would like to be able to programmatically invoke the right-click menu options, initiated from user events like rollover and whatnot of course. Is this possible?
Speci
As far a I know, there is absolutely no way of doing this in a generic form using pure Javascript. You would have to build extensions (or maybe a Greasemonkey script for Firefox, I don't know) for each browser.
You can't and this is because of security limitations.
If you could do that, malicious websites can access your browser and tamper with your system.
I seriously hope you can't do that... No website should be able to touch my desktop picture or iPhoto library.