.main_menu{
	font-size: 75%;
	width: 900px;
	font-family: Verdana;
	font-weight: bold;
	padding-top: 3px;
	word-spacing: -2px;
	height: 30px;
}

.main_menu ul{
	padding: 5px 0;
	margin: 0;
	text-align: left; 
	overflow: hidden;
}

.main_menu ul li{
	display: inline;
	margin: 0;
	padding-top: 8px;
	padding-right: 12px;
	padding-bottom: 8px;
	padding-left: 6px;
}

.main_menu ul li a:link, .main_menu ul li a:visited {
	color: #000;
	text-decoration: none;
	font-weight : bold;
}
.main_menu ul li a:hover, .main_menu ul li a:active{
	color: #FFF;
	text-decoration: none;
	font-weight : bold;
}
.main_menu ul li.current a {
	color: #FFF;
	margin: 0;
	text-decoration: none;
	font-weight : bold;
}

#upper_nav{
	height: 21px;
	width: 900px;
	text-align: right;
}
.upper_nav-img{
	border-left-width: 1px;
	border-left-style: solid;
	border-left-color: #dda300;
}
.sub_menu {
	font-size: 0.85em;
	color: #660066;
	line-height: 1.85em;
	text-decoration: none;
	font-family: Arial, Helvetica, sans-serif;
	font-weight: normal;
}
.sub_menu a:link, .sub_menu a:visited {
	font-size: 0.85em;
	color: #660066;
	line-height: 1.85em;
	text-decoration: none;
	font-family: Arial, Helvetica, sans-serif;
	font-weight: normal;
}
.sub_menu a:hover, .sub_menu a:active {
	font-size: 0.85em;
	color: #000000;
	line-height: 1.85em;
	text-decoration: none;
	font-family: Arial, Helvetica, sans-serif;
	font-weight: normal;
}

#pull_down_info {
	display:none;
	position:absolute;
	left:800px;
	top:52px;
	width:180px;
	height:105px;
	z-index:1;
	background-image: url(/20201208164122oe_/https://www.cuhk.edu.hk/libraryextension/en/images/pull_down_bg.png);
	overflow: visible;
	text-align: left;
	color: #660066;
	border-top-width: 2px;
	border-top-style: solid;
	border-top-color: #993300;
	padding-top: 8px;
	padding-right: 5px;
	padding-left: 10px;
}

#pull_down_swift {
	display:none;
	position:absolute;
	left:500px;
	top:52px;
	width:180px;
	height:160px;
	z-index:1;
	background-image: url(/20201208164122oe_/https://www.cuhk.edu.hk/libraryextension/en/images/pull_down_bg.png);
	overflow: visible;
	text-align: left;
	color: #660066;
	border-top-width: 2px;
	border-top-style: solid;
	border-top-color: #993300;
	padding-top: 8px;
	padding-right: 5px;
	padding-left: 10px;
}