*{margin:0 auto;padding:0;}
body,td,th {
	font-family: 宋体;
	font-size: 12px;
}
body {
	overflow-x:hidden;
	overflow-y:hidden;
}


/* table {
    margin-right: auto;
    margin-left: auto;
} */
.maindisplay{
	width: 100%;
	height: 441;
	display: none;
	
}

/* .display{
	color: black;
}
 */
#contentDiv{
	width: 100%;
	height: 100%;
	position:absolute;
    	z-index: 2;
    	top:0;
    	left:0; 
    	margin:0;
}

#backgroundDiv{
	width: 100%;
	height:100%;
	background-image: url("../images/wallpaper/1.jpg");
	background-size:cover;
	/* 👇 必须加上这 4 行才能显示 */
    position: fixed;   /* 固定定位，铺满视口 */
    top: 0;
    left: 0;
    z-index:1;        /* 放在最底层，不遮挡内容 */
}

#loginDiv{
	width: 100%;
	height: 100%;
	position: absolute;
	z-index: 2;
	
	left: 0px;
	top: 0px;
	

}

#bottomDiv{
	width:100%;
	height:35;
	position: absolute;
	z-index: 100;
	color: white;
	text-align:center;
	background-image: url("../images/bottomback.jpg");
}


定义顶部连接的样式

#wallpapertd a:link {
	color: #FFFFFF;
	text-decoration: none;
}
#wallpapertd a:visited {
	text-decoration: none;
	color: #FFFFFF;
}
#wallpapertd a:hover {
	text-decoration: none;
	color: #00FFFF;
}
#wallpapertd a:active {
	text-decoration: none;
	color: #66CCFF;
}

#papebottom{
	color: white;
}

#loginExitDiv{
	width: 100px;
	height: 35px;
	position: absolute;
	z-index: 80;
	color: white;
	text-align:center;
}

html {
overflow-x:hidden;
overflow-y:hidden;
}