menu to layer

Hello all,

I have built a rollover menu with sublistings using CSS on a layer and I am
able to link it another file but I was wondering if there is a way to show/
hide a specific layer on the page i am linking it to.

example: about us (main heading)
history (sub heading shows on rollover)
philosophy (sub heading shows on rollover)

problem: linking the "philosophy" or "history" selections to show a specific
layer on the page "about us".

Thanks in advance!

MKH