Syntax checking from vim is handy. By checking your Javascript syntax from vim, rather than the browser, you'll save time and aggravation. To do it, you'll need Spidermonkey, which allows you to run Javascript without a browser, and JsLint, a Javascript syntax-checker writter in Javascript.

Installing Spidermonkey

Consult the build instructions page for installation instructions for many architectures, or use the quick instructions below for Ubuntu and Centos.