How to re-skin a website at the client end?

Any ways to re-skin a website (at the client end) where the format and layout of the page is mostly known and constant?

For example, changing the language of a certain form on eBay to Japanese.

I know that with Opera and Firefox a website's CSS can be overridden. Are there any ways in any browsers or browser plugins to override text and words on a certain page of a certain website?

Some of my ideas:

• browser plugin
• xslt / xPath 开发者_开发知识库etc

Any thoughts?

You can try a combination of CSS and using Greasemonkey (userscripts, in JavaScript) to change styles as well as change content. Greasemonkey & userscripts are supported by Firefox (by plugin) and Chrome (natively).