[texhax] Add space and separator except at top of page in LaTeX

[Ryan Hinton]

Please include my email address on any replies; I am not subscribed to 
the list.

Can I detect in a macro when I am at the top of a page to avoid adding 
boxes (vertical space and horizontal rule)?

I am using LaTeX to write my homework solutions.  For clarity, I add 
some vertical space and a horizontal rule to visually separate the 
problems.  But I do not need this visual separation if a new problem 
starts at the top of a page, so I would like to omit it to save space 
and minimize confusion.

Thank you!

-- 
Ryan Hinton
iobass at email.com