#btn_a {
	position: absolute;
	z-index: 200;
	width: 54px;
	right: 0px;
	top: -130px;
}
#btn_b {
	position: absolute;
	z-index: 200;
	width: 54px;
	right: 54px;
	top: -130px;
}
#btn_c {
	position: absolute;
	z-index: 200;
	width: 54px;
	right: 108px;
	top: -130px;
}