Dropdown Menu #0

Project Page: http://hansnewbie.github.io/DropdownMenu/

This is a fun project by me to try making a dropdown menu. Why? I find it very fancy, and last time before CSS was universal, my friend helped me to make it (I cannot remember using what). I really want to try making it by myself.

Still need to improve some stuff, though. More consistent dropdown (there is a gap between the main button and the list that often makes the list to be gone) and render on top of the text.