From Jahwiki
The styleguide sets the basic rules how wiki pages should look like. You should also read the [[Community:_Basic_wiki_rules|basic WIKI rules. If you have any questions to this you may contact a member of the Documentation team.
[edit] HTML/CSS
You should try to avoid any HTML or CSS tags in your wiki contents. try to use the Wiki markup language. Using HTML and inline CSS will making it impossible to change the design lateron.
[edit] Text decoration
Please use as little text decoration as possible. This makes the text more readable.
If you really need to emphasize something, please don't use HTML tags, use Wikimarkup. There are a few templates available that may also be helpful for this.
[edit] Templates
There are already some Jahshaka styled Templates available. If you need another template, talk to the Documentation-Team. They will help you, if you can't created the template or don't know how.
[edit] Colors
Please don't use special colors (except in templates). The Wiki will get an new stylesheet and hardcoded color selections will make it hard to change the layout. Please don“t use colors not already used on this page.
[edit] Images
Please be careful with the images you use. High resolution pics may brake the design of the wikipage, generate a huge amount of bandwidth and long loading times. So please try to use small and optimized pictures for the wiki.