cssQuery()

Web site: http://dean.edwards.name/my/cssQuery/

License: LGPL

cssQuery() is a cross-browser JavaScript function that allows you to query the DOM using CSS selectors. It includes support for CSS1 and CSS2 selectors and for parts of CSS3. It's useful for creating your own behaviors, such as functionality, and for trying out new CSS3 selectors that are not yet supported in all browsers.