We take a lot of trouble to ensure that our website uses only valid, standard HTML, and we're not even slightly tempted to use glitzy features that look good in one browser but don't work in another, so we can promise you that our site is not the problem.
If you actually clicked on a button, like the Search button, and nothing happened, you might be behind a proxy or web filter that doesn't like you making POST requests. If you have a web filter switched on, turn it off, reload the page and try again.