.warning{
	width: 5rem;
	height: 0.8rem;
	line-height: 0.8rem;
	background: rgba(0,0,0,0.7);
	color: #FFFFFF;
	position: fixed;
	left: 50%;
	top: 50%;
	margin-left: -2.5rem;
	margin-top: -0.2rem;
	border-radius:4px;
	-webkit-border-radius:4px;
	-moz-border-radius:4px;
	font-size: 0.3rem;
	text-align: center;
	display: none;
}