It all depends on the context: why, what, where, where, how much (content)
Do you want to:
- help the user with two lines of useful text before he presents the form ("No underscore in the field **, only letters and numbers" - SO is a good example for this - excellent, and a stylized tooltip should work with huge bonuses for ARIA and / or unobtrusive JS).
- switch to full-screen mode (I donβt want this, and nobody wants it anymore: too many abuses in the past)
You can test Amazon.com left navigation with and without JS: unobtrusive and thoughtful!
No new window, no div? Then you are left with ul, fieldset, an object, animated gif files, etc. OK don't joke anymore. Maybe tabs like at www.barelyfitz.com/projects/tabber/
source share