HTML 
Drop down 
Menu 
More UI elements from this designer
-
8343
632
CSS3 Gradient Buttons
-
23058
1011
CSS Dock Menu
-
11167
971
CSS Social Buttons
css drop down menus are good. For Google Chrome, Mozilla firefox, the menu will work better for IE (6/7 +) may not work, as the old versions of IE will not support the CSS3. For that simple Jquery to be included so that the menu would work in all browsers. For detailed CSS jquery menu example with code, please check the following pages:
http://www.freemenu.info/2013/05/js-menu.html
http://www.freemenu.info/2013/06/js10.html