For the things on that page, there's almost no difference between the languages, other than needing ; at the end of statements and () fo function calls with no arguments.
Detached Dialogs are more complex, but the manual has examples for those in both languages.
(We'll do the same for Simple Dialogs in an update, since that was already written but not published yet.)
You can find more JScript examples for Detached Dialogs on the forum. Simple one:
More advanced one:
For other types of dialogs/UI or other scripting examples, you can usually find examples by searching.