Mozilla 1 and Opera 7 allow you to use your own tags, and apply CSS to them, so they work just like HTML. (View the Source of this page.) It's almost like XML!
Note: This does not work with Internet Explorer. Opera 7.50 Preview 4 only styles the border of the box. (Which is probably correct behaviour as I should be using a custom DTD here!)
|This is a sample
||table using cells
© Chris Hester. Last updated 30 July 2005.
|yet no standard
||HTML was used!