html:after {
	content: "";
	background-image:
	url('../images/voice_btn_off.png'),
	url('../images/tapbtn_01_off.png'),
	url('../images/tapbtn_02_on.png'),
	url('../images/tapbtn_03_on.png'),
	url('../images/tapbtn_04_on.png'),
	url('../images/tapbtn_05_on.png'),
	url('../images/tapbtn_06_on.png');
}