[ALUG] DHTML date format - where can I find a description?

I'm playing with tables in TWiki and one of the parameters for a date column is "DHTML date format" which specifies the format of the date (I assume). However I can't find anywhere that documents it, does anyone have any suggestions - either where to find doucmentation or a basic description? -- Chris Green (chris@areti.co.uk) "Never ascribe to malice that which can be explained by incompetence."