JavaScriptLint.vim is a Vim plugin that allows the JavaScript Lint (jsl) program from http://www.javascriptlint.com to be tightly integrated with Vim. Once installed, the contents of a javascript file will be passed through the jsl program after the file's buffer is saved. Any lint warnings will be placed in the quickfix error window, which provides easy navigation to the source of the warning. JavaScript Lint must be properly installed on your system for this plugin to work. This page should get you started: http://www.javascriptlint.com/docs/index.htm