Waldo: Search the JavaScript Object Model in under 1 KB

Here’s a tiny util that you can save as a bookmarklet and use to crawl the JavaScript object model of any web site. Waldo (thanks to @shinypb for the name!) lets you find and inspect instances by name, type or value, and it can be easily customized to add additional tests. It runs in the console on Chrome, Firefox, Safari and IE>8. It's sourced on github. Feel free to fork it if you want to add more search methods or a spiffy UI.

(Update: Check out this alternate version by @jdalton)