Many sites use packed/compressed/minified javascript. That page in particular uses a number of jQuery related libraries that probably come pre-minified. This

Many sites use packed/compressed/minified javascript. That page in particular uses a number of jQuery related libraries that probably come pre-minified. This cuts down on their size, making things quicker. It also happens to obfuscate the scripts. There are some people who obfuscate for the sake of it, but it's generally not very effective. We have various ad providers try and get us to host obfuscated iframe buster scripts (so they can expand ads outside of iframes). Those types of scripts are so prone to cross site scripting attacks that we've started informally auditing them before we put them out. When they won't give us the nicely formatted and commented source (it's dumb), we just run them through various javascript prettifiers to have a look anyway.