Digital Web Magazine - Keep Javascript Simple - Peter-Paul Koch argues against external Javascript libraries, which often needlessly replace already quite compact-and-compatible DOM statements.

I could've probably moved a lot of iambald-code into a single DHTML library, but never really felt the need--more so after I gave up trying to support Netscape 4. Plus, I like the fact that visitors can simply View Source a page and see the whole code without having to go searching through separate .js files. [via paranoidfish.org]