newbie questions... What is the advantage of the fact that IDs must be unique on a page?
1. getElementById() works.
2. Validation. If you use <div id="maincontent">, validator will complain when you have two or more such divs (typical copy&paste accident :)
Additionally IDs have higher priority than class in CSS, so it's easier to make "local" styles for element with an ID than with a class.
-- regards, Kornel Lesiński
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