img#bt_arrow_n {
	position: absolute;
	top: 190px;
	left: 360px;
	z-index: 999;
}

img#bt_arrow_e {
	position: absolute;
	top: 215px;
	left: 385px;
	z-index: 999;
}

img#bt_arrow_s {
	position: absolute;
	top: 240px;
	left: 360px;
	z-index: 999;
}

img#bt_arrow_w {
	position: absolute;
	top: 215px;
	left: 335px;
	z-index: 999;
}