How to comment codes in .rhtml file

Hi,

I know how to comment codes in ruby (.rb) file. But can anyone say how
to comment codes in rails file i mean in .rhtml file .

HTML comments:

<!-- I'm a comment -->

Erb-Comments

<%# I'm a comment, too! %>

Regards,
Timo

Note also that the former will be carried through to the output, while
the latter will not.