Can formatting such as superscript be used in the ALT attribute?

[djm2]

In the alt text for a picture is it possible to get the registered trade mark symbol to be in superscript?

[DrDoc]

Welcome to Webmaster World!

While you can use ® to get the symbol to show up, you cannot format the text in any way.

[djm2]

That's a pity, thanks anyway!