html,body {
	height: 100%;
}


* html .layer_board_bg,
* html .layer_board {
	position: absolute;
}

.layer_board_bg {
	position: fixed;
	width: 100%;
	height: 100%;

	z-index: 1000;

	top: 0;
	left: 0;

	display: none;
	cursor: pointer;
	background: #000;
}

.layer_board {
	display: none;
	position: fixed;
	top: 50%;
  left: 50%;
  margin-right: -50%;
  -webkit-transform: translate(-50%, -50%); /* Safari用 */
  transform: translate(-50%, -50%);

	text-align: center;
	z-index: 2000;

}
.btn_close a{
	color: #fff;
	font-size: 130%;
	text-decoration: none;
}