Comment by Grue3

A lot of popular websites have pretty crappily written JS code. The reason it's not noticed is that usually it's served compressed. The reason why it's crappy is that the bulk of functionality is implemented server-side, and the person who ends up writing that code is primarily a server-side programmer who half-asses a JS snippet to finish the feature, and then since it works, it is never refactored. It's not "real programming" anyway ;)