.black_overlay {
	display: none;
	position: fixed;
	top: 0%;
	left: 0%;
	width: 100%;
	height: 100%;
	background-color: #ffffff;
	z-index: 1001;
	-moz-opacity: 0.95;
	opacity: 0.95;
	filter: alpha(opacity=95);
}
.white_content {
	display: none;
	position: fixed;
	top: 50%;
	left: 50%;
    margin-left:-100px;
    margin-top:-100px;
	width: 200px;
    height:243px;
	background-color: white;
	z-index: 1002; /* 数字的大小指明了div的相对层，数字大的在上层 */
	overflow: auto;
}
.close {    
    color:#808080;
    font-size:10px;
    text-align:right;
}
.scanQR {
    font-weight:600;
}