merge 2 separate menus into a single menu
问题 I have 2 separate menus in different places on a page like this: <div class="TopNav"> <ul> <li><a href="">one</a></li> <li><a href="">two</a></li> <li><a href="">three</a></li> </ul> </div> <div class="LowerNav"> <ul> <li><a href="">Item 1</a></li> <li><a href="">Item 2</a></li> <li><a href="">Item 3</a></li> </ul> </div> Is there a way a can combine both of the navigations in a full width style toggle drop down when the device width is less the 768? so they will turn into: <div class=