Highlight "current page" when 2 menus on same page
I am currently working on a site at 37lq45x where, on certain pages, I have two menus (a "main menu" and a "sub menu"). The "main menu" works fine and highlights the correct page, but when I go to one of the pages using the "sub menu", there is no highlighted current page in the "sub menu".
Is there any way I can make the "sub menu" highlight the correct page as well as the "main menu"?
Thanks in advance, Craig