My client wants this:
A single menu on the website saying "Home About Us Photos Contact" that would be the main menu throughout - let's call this "mainmenu". When the user clicks on "About Us", he wants there to be a menu that pops up underneath mainmenu, that is an additional menu stating "Locations Hours Maps". For another example, when you click on "Contact", a menu would now appear underneath mainmenu, saying "Email Phone Mailbox", and etc.
Can I do this in WordPress, and if so please tell me how.