I found these awesome maps on weather underground. However, changing the timezone reloads the whole page. It’s a pain to flick through a few timezones and see how the weather is due to change. So I wrote a little GreaseMonkey script, and bingo, now it’s easy.
Install the script, then change the drop down list to select another time and watch the map load live, ajaxified, without a page reload. Use the up / down keys on the keyboard to switch maps painlessly. The Prev / Next buttons are not affected, they work as usual.