Removed dummy onclick handler on CSS buttons. Moved horizontal rule code to a function like the other buttons.
Removed dummy onclick handler on CSS buttons.
Moved horizontal rule code to a function like the other buttons.

sch1zo/wmd,diversen/jquery-markedit,derobins/wmd,diversen/jquery-markedit,diversen/jquery-markedit,diversen/jquery-markedit,derobins/wmd