body{
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
}

.zj_background{
	background: #11385d url("../images/background.jpg") center center fixed;
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	background-attachment: fixed;
	margin: 0;	
	width: 100%;
	height: 100%;
	display: block;
	position: absolute;
}