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 {
	width:700px;
	padding:40px 0;
	background:#FFF;
	display: none;
	position: fixed;
	top:40%;
	left: 50%;
	margin: 0 0px 0px -25%;
	
	text-align: center;
	z-index: 2000;
}