A basic and properly structured HTML/CSS drop down menu can serve you just as well. In fact, it may make your site appear more responsive to not use animations and instantly display the menu instead.

Locate the lines for "#navigation" and ".sub-menu". You will want to change the "sub-menu" list item class to float left and display as inline to make this tier horizontal.

The new Google drop-down menu features all the links that were previously listed in the black horizontal strip. Users can view the drop-down menu content even without signing in to their account.