MediaWiki:Userjsyoucanpreview

Code that you insert on this page could contain malicious content capable of compromising your account. If you are unsure whether code you are adding to this page is safe, you can ask at the appropriate village pump. The code will be executed when previewing this page under some skins, including Monobook.

Tip: Use the 'Show preview' button to test your new css/js before saving. Using some custom Javascript? Share at the scripts directory.