#rewind-button[disabled="true"] { display: none; }
#rewind-prev-button[disabled="true"] { display: none; }
#back-button[disabled="true"] { display: none; }
#forward-button[disabled="true"] { display: none; }
#fastforward-button[disabled="true"] { display: none; }
#fastforward-next-button[disabled="true"] { display: none; }
#reload-button[disabled="true"] { display: none; }
#stop-button[disabled="true"] { display: none; }