Javascript Order of Execution

[user1234]

I was told by a co-worker that Javascript executes in a non-sequential fashion...I've never heard this before. Can anyone lend any validation (and if so perhaps some links/documentation/etc) to this? Does the non-sequential fashion apply to how it executes it's lines of code? Handling of events? etc? Any help/insight would be greatly appreciated!

[felgall]

Javascript is an event triggered language. The code associated with a particular event will run when that event is triggered.