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;
    position:absolute;
    top:50%;
    left:50%;
    width:500px;

    -webkit-transform: translate(-50%,-50%);

    -moz-transform: translate(-50%,-50%);

    transform: translate(-50%,-50%);

	
	text-align: center;
	z-index: 2000;
    font-size:25px;
}