HTML = sign + zeroPadInteger( hours );
						if (hours == 0) {
							hrEl.classList.add( 'mute' );
						}
						else {
							hrEl.classList.remove( 'mute' );
						}
						minEl.innerHTML = ':' + zeroPadInteger( minutes );
						if (hours == 0 && minutes == 0) {
							minEl.classList.add( 'mute' );
						}
						else {
							minEl.classList.remove( 'mute' );
						}
						secEl.innerHTML = ':' + zeroPadInteger( seconds );
					}

					function _updateTimer() {

						var diff, hours, minutes, seconds,
