Robert Nyman (DomAssistant creator) has released a handy Obtrusive JavaScript Checker.
Obtrusive JavaScript Checker is a tool to traverse through all elements in a web page, and when it finds a HTML element with inline events (which is bad, JavaScript should be unobtrusive), it highlights it with a red border. It also highlights javascript: links with a magenta border.
Available as a Firefox extension, Greasemonkey user script, as well as a Ubiquity command.

Previous Comments ~
No comments have been posted yet – comments are open though, so you can start the conversation if you so desire…